For some people, the sight of a mouse can be reason to scream. For other mice, the same sight can be reason to sing.
Mice will probably 21 sing their way to any concert, but researchers in the United States have found 22 that mice do, 23 , sing.
Scientists already knew that mice make ultrasonic(超声波) sounds—noises that are too high-pitched(高音的) for people to hear 24 special equipment.
To find out whether mice put such sounds together in song-like 25 , the researchers recorded the sounds of 1 mice. Using computer 26 , they were able to separate the sounds into specific types of syllables(音节), and found the mice produced about 10 syllables per second.
The results showed that nearly all of the mice repeated sequences(顺序) of syllables in different patterns. That’s enough to meet the definition of what scientists 27 song. But not all scientists are 28 _ that what the mice are doing is 29 singing. To prove it, the researchers must show that there’s learning involved. And, they need to __ 30 why the mice sing.
21. A. almost B. even C. never D. usually
22. A. coincidence B. evidence C. guidance D. instance
23. A. at once B. by means C. for example D. in fact
24. A. during B. inside C. through D. without
25. A. fashions B. instructions C. patterns D. styles
26. A. access B. printer C. screen D. software
27. A. call B. hear C. sing D. write
28. A. accustomed B. convinced C. involved D. qualified
29. A. actually B. obviously C. simply D. unlikely
30. A. figure out B. get about C. run across D. talk over
Once in a blue moon there is one on New Year's Eve. Revelers ringing in 2010 will be treated to a so-called blue moon. According to popular definition, a blue moon is the second full moon in a month. But don't 1 it to be blue - the name has nothing to 2 the color of our closest celestial（天体） neighbor.
A full moon 3 on December 2. It will appear again on Thursday in time for the New Year's countdown.
"If you're in Times Square, you'll see the 4 moon right above you. It's going to be that brilliant," said Jack Horkheimer, director emeritus of the Miami Space Transit Planetarium and host of a weekly astronomy TV show.
The New Year's Eve blue moon will be 5 in the United States, Canada, Europe, South America and Africa. For partygoers in Australia and Asia, the full moon does not show up 6 New Year's Day, making January a blue moon month for them.
However, the Eastern Hemisphere can celebrate with a partial lunar eclipse（月蚀） on New Year's Eve when 7 of the moon enters the Earth's shadow. The 8 will not be visible in the Americas.
A full moon occurs 9 29.5 days, and most years have 12. 10 , an extra full moon in a month - a blue moon - occurs every 2.5 years. The 11 time there was a lunar double take was in May 2007. New Year's Eve blue moons are rarer, occurring every 19 years. The last time was in 1990; the next one won't 12 again until 2028.
Blue moons have no astronomical 13 , said Greg Laughlin, an astronomer at the University of California, Santa Cruz.
"`Blue moon' is just a 14 in the same sense as a `hunter's moon' or a `harvest moon,'" Laughlin said in an e-mail.
The popular definition of blue moon 15 after a writer for Sky & Telescope magazine in 1946 misunderstood the Maine Farmer's Calendar and marked a blue moon as the second full moon in a month. In fact, the calendar 16 a blue moon as the third full moon in a season with four full moons, not the usual three.
Though Sky & Telescope corrected the 17 decades later, the definition caught on. For purists（语言纯正癖者）, however, this New Year's Eve full moon doesn't even qualify as a 18 moon. It's just the first full moon of the winter season.
In a tongue-in-cheek essay 19 on the magazine's Web site this week, senior contributing editor Kelly Beatty wrote: "If skies are clear when I'm 20 celebrating, I'll take a peek（眯着眼睛看） at that brilliant orb（天体） as it rises over the Boston skyline to see if it's an icy shade of blue. Or maybe I'll just howl."
( ) 1. A. wish B. wait C. hope D. expect
( ) 2. A. deal with B. do with C. develop with D. form into
( ) 3. A. occurred B. came C. ran D. went
( ) 4. A. full B. half C. bright D. part
( ) 5. A. out of sight B. visible C. big D. clear
( ) 6. A. until B. when C. before D. since
( ) 7. A. part B. all C. any D. none
( ) 8. A. moon B. eclipse C. sun D. shadow
( ) 9. A. each B. every C. either D. all
( ) 10. A. On the whole B. Generally speaking C. On average D. In addition
( ) 11. A. last B. next C. other D. another
( ) 12. A. go B. see C. come D. look
( ) 13. A. point B. evident C. theory D. significance
( ) 14. A. name B. object C. phenomenon D. tradition
( ) 15. A. created B. came about C. made D. copied
( ) 16. A. named B. called C. introduced D. defined
( ) 17. A. error B. name C. reality D. number
( ) 18. A. blue B. red C. yellow D. grey
( ) 19. A. published B. posted C. printed D. written
( ) 20. A. in B. out C. away D. on
For some people, the sight of a mouse can be reason to scream. For other mice, the same sight can be reason to sing.
Mice will probably 21 sing their way to any concert, but researchers in the United States have found 22 that mice do, 23 , sing.
Scientists already knew that mice make ultrasonic(超声波) sounds—noises that are too high-pitched(高音的) for people to hear 24 special equipment.
To find out whether mice put such sounds together in song-like 25 , the researchers recorded the sounds of 1 mice. Using computer 26 , they were able to separate the sounds into specific types of syllables(音节), and found the mice produced about 10 syllables per second.
The results showed that nearly all of the mice repeated sequences(顺序) of syllables in different patterns. That’s enough to meet the definition of what scientists 27 song. But not all scientists are 28 _ that what the mice are doing is 29 singing. To prove it, the researchers must show that there’s learning involved. And, they need to __ 30 why the mice sing.
21. A. almost B. even C. never D. usually
22. A. coincidence B. evidence C. guidance D. instance
23. A. at once B. by means C. for example D. in fact
24. A. during B. inside C. through D. without
25. A. fashions B. instructions C. patterns D. styles
26. A. access B. printer C. screen D. software
27. A. call B. hear C. sing D. write
28. A. accustomed B. convinced C. involved D. qualified
29. A. actually B. obviously C. simply D. unlikely
30. A. figure out B. get about C. run across D. talk over
You are a German living in Berlin. One day you’ re walk¬ing down the street, minding your own business, when sudden¬ly a stranger comes up with a smile on his face. After stopping you, he holds a small electronic device (装置) close to his face and speaks slowly into it, saying, in English," Can you tell me where I can buy some sauerkraut?" What should you do? (a) Run away; (b) Call the police; or (c) Listen closely for the device to say in German," Konnen Sie mir bitte sagen, welches sauerkraut haufen kann?"
The most proper answer would be (c) because the person in front of you is only a tourist trying to enjoy himself. The de¬vice is said to be the world’s first portable(便携的) translator — a hand-held microcomputer that at the same time translates one spoken language into another. The four-pound, battery-op¬erated product is called the Voice, and it is the invention of Advanced Products and Technologies, an American electronics company. When the Voice is introduced in the Unite States in late April — at a price of (1,500 — it will be used to trans¬late spoken English into Italian, German, French and Span¬ish. The product comes with separate cartridges(盒式存储器) for each of the four languages, which can be changed when the user travels from one country to another. It will be sold in Eu¬rope soon after the US introduction, with cartridges that trans¬late Italian, German, French and Spanish into English.
The Voice uses a microchip(微型集成电路片) to trans¬late languages. It is Started by voice command and produces voice output through a built-in speaker. When the user makes a statement or asks a question, the Voice immediately repeats what has been said in another language.
1. The device held by the stranger is probably a kind of________.
A. a two-way radio B. language translator
C. easily-carried speaker D. a multi-functioned computer
2. What does the last sentence of the first paragraph mean?
A. Can you tell me where I can buy some sauerkraut?
B. Can I ask for some information from the police?
C. Would you like to try my device?
D. Would you not run away if I ask you where to buy some sauerkraut?
3. When the stranger says," Can you tell... sauerkraut?" he is ________.
A. learning German from his device
B. asking you the way to the sauerkraut shop
C. making fun of you with his device
D. testing his device for fun
4. Which of the following is not mentioned in the text?
A. The price of the hand-held microcomputer.
B. The function of the product Voice.
C. The producer pf the small electronic device.
D. The number of the device sold to the European coun¬tries.
Of all living creatures on earth, insects are the most plentiful. Some 36 are very useful to man, for example, bees, 37 we get honey and wax, and silkworms, which 38 us with silk. Other varieties, 39 , are extremely harmful, and do a great 40 of damage, especially to crops. Locusts （蝗虫） are perhaps the most dangerous of all, 41 they will eat almost any green 42 , and when millions of them 43 on cultivated land（耕地）they soon leave it 44 . In some countries they are the farmer’s 45 enemy. Another nuisance is the common 46 , not only because it 47 us indoors and out - of- doors, but because it spreads diseases.
Scientists have given much time and 48 to the study of insects. It needs the most careful and 49 observation. Thanks 50 their discoveries we now know almost all 51 is to be known about the habits of these hardworking insects, bees and ants, which live in 52 better planned in some ways than our 53 . But the most valuable work has been done in trying to give 54 to men, animals and crops from the 55 which insects cause.
36．A. members B. forms C. qualities D. varieties
37．A. by which B. from which C. of which D. in which
38．A. give B. produce C. offer D. supply
39．A. however B. meanwhile C. therefore D. what's more
40．A. majority B. number C. amount D. quantity
41．A. and B. for C. if D. when
42．A. grass B. field C. fruit D. plant
43．A. settle B. attack C. pass D. cross
44．A. bare B. nothing C. empty D. untouched
45．A. hardest B. greatest C. serious D. wildest
46．A. insect B. creature C. fly D. enemy
47．A. dislikes B. bites C. worries D. hates
48．A. understanding B. ideas C. comprehension D. thought
49．A. serious B. patient C. curious D. long
50．A. for B. of C. to D. with
51．A. that B. which C. there D. what
52．A. societies B. crowds C. teams D. organizations
53．A. world B. nation C. selves D. own
54．A. help B. protection C. living D. defense
55．A. injury B. wound C. sickness D. ruin
Why don’t birds get lost on their long migratory (迁移的) flights? Scientists tried their best to find the 1 to this question for many years. The reasons have been discovered only lately.
2 ago experiments showed that birds depend on the sun to guide them 3 . But what about birds that fly mainly by night? 4 with man-made stars have 5 that certain night-flying birds are able to follow the 6 in their long distance flights.
One such 7 , a warbler (鸣禽), had spent its lifetime in a 8 and had never flown under a natural sky. Yet is showed its 9 by birth to use the stars for guidance. The bird's cage was put under a man-made star-filled sky at migration 10 . The bird tried to fly 11 the same direction as 12 taken by other birds in the building. Any 13 in the position of the make-believe (虚构的) stars 14 a change in the direction of its flight.
Scientists think that warblers, 15 flying in daylight, use the sun for guidance. But stars are clearly their important 16 of navigation(导航). What do they do when the stars are 17 behind the clouds? Clearly, they find their way by such land 18 as mountains, coastlines and river courses. But when it's too 19 to see these, the warblers circle 201 , unable to find out where they were.
1. A. reply B. answer C. discovery D. replies
2. A. Not long B. Long C. Centuries D. Years
3. A. during the night B. during daylight hours
C. in winter D. in the dark
4. A. Examinations B. Labs C. Tests D. In the dark
5. A. been proved B. found C. been found D. proved
6. A. stars B. moon C. route D. sun
7. A. star B. scientist C. bird D. flight
8. A. forest B. cage C. nest D. cave
9. A. strength B. ability C. experience D. practice
10. A. time B. place C. way D. season
11. A. to B. towards C. in D. under
12. A. that B. which C. one D. it
13. A. one B. change C. way D. bird
14. A. caused B. gave C. resulted D. meant
15. A. for B. when C. after D. they are
16. A. ways B. means C. objects D. homes
17. A. shown B. covered C. moved D. hidden
18. A. areas B. surface C. marks D. signs
19. A. far B. high C. dark D. bright
20. A. helplessly B. quickly C. easily D. freely
Modern zoos are very different from zoos built fifty years ago. At that time, zoos were places ___1___people could see animals from many parts of the world. The animals lived in _____2___with iron bars. The cages were easy to keep clean.__ 3___, for the animals, the cages were small and impossible to hide in. Although the zoo ____4____ took good care of them, many of the ____5____ did not feel comfortable, and they often became ____6____.
In modern zoos, people can see animals in more _____7___ conditions. The animals are given more freedom in larger places ____8____ they can live more freely as they would in _____9___. Even the appearance of zoos has changed. Trees and grass grow in the cages, and water flows____10____ the places that the animals live in. There are few bars,____ 11____ there is often a deep ditch(沟), filled with _____12___, which surrounds a space where several_____13___ of animals live together as they would naturally. In an American zoo, the visitor can walk ____14____ a huge special cage that is filled with trees, some small animals and many birds. And it is large enough for all the birds to live ____15____.In a zoo in New York, because of special night ____16____, people can observe certain animals that are ___17_____ only at night when most zoos are closed. Some zoos have special places for visitors to ____18____ animals that live in the desert or underwater. Some other zoos have special places for animals that live in cold conditions like the ____19____ from the Arctic.
Modern zoos not only show animals for visitors, but also ____20____ and save rare animals. For this reason, fifty years from now, the grand children of today’s can still be able to enjoy watching these animals.
1. A. that B. where C. which D. there
2. A. houses B. rooms C. cages D. offices
3. A.Therefore B. However C. So D. Though
4. A. masters B. managers C. keepers D. trainers
5 .A. workers B. animals C. bears D. animals
6. A. excited B. angry C. ill D. frightened
7. A. natural B. difficult C. warm D. different
8. A. so that B. and C. but D. or
9. A. forest B. nature C. rivers D. the water
10. A. in B. by C. near D. through
11. A. instead B. instead of C. and D. or
12. A. stones B. earth C. oil D. water
13. A. sorts B. families C. classes D. groups
14. A. by B. out C. through D. in
15. A. happily B. naturally C. deeply D. hardly
16. A. moon B. sign C. light D. signal
17. A. live B. active C. living D. sleeping
18. A. feel B. touch C. watch D. talk to
19. A. snakes B. monkeys C. bears D. tigers
20. A. buy B. keep C. sell D. catch
From the earlier time it was well ___1___to the Peruvians that when a cut ___2____made in the thick skin of a ___3____tree, a white liquid like milk came ___4___. From this fluid (流动的) a sticky ___5_____of rubber might be made. This rubber is ___6____and wax-like when warm so that it is ___7_____to give any form.
The Peruvians ___8____the discovery that it is very good for ___9____out water. Then in the early ___10____of the century they made overshoes to ___11___their feet dry. Then a certain Mr Mackintosh ___12_____coats of cloth which were ___13____with rubber. Today Mackintosh raincoats are still ___14_____after him.
But these first rubber shoes ___15______raincoats were unpleasantly soft and sticky in ___16___. They were also stiff and very ___17____in winter. They were like wax(蜡) although they ___18____a bit stronger.
But the rubber ___19___use today has been improved. It is ___20____sticky but soft and elastic(弹性的) and strong enough for any season.
1. A. talked B. heard C. seen D. known
2. A. has B. was C. may D. will
3. A. rubber B. apple C. orange D. oak
4. A. from B. through C. out D. up
5. A. raincoat B. shoes C. border D. mass
6. A. hard B. fast C. stubborn D. soft
7. A. important B. impossible C. possible D. uncertain
8. A. made B. found C. wrote D. neglected
9. A. finding B. keeping C. making D. pouring
10. A. kind B. part C. sort D. halves
11. A. clean B. clear C. keep D. prevent
12. A. made B. found C. appeared D. gave
13. A. full B. like C. lined D. applied
14. A. looked B. named C. made D. searched
15. A. or B. and C. with D. but
16. A. today B. summer C. winter D. rain
17. A. soft B. sticky C. elastic D. cold
18. A. felt B. made C. needed D. produced
19. A. Mr Mackintosh B. the Peruvians C. we D. is
20. A. also B. always C. neither D. not
Is the world really going mad? 1._____day I was sittng in a restaurant 2._____ a quick drink and a talk with a few friends when it suddenly 3._____ me that almost everyone in the restaurant was smoking. It wasn’t long 4._____ the whole room was 5._____ with smoke. I asked with an apology for 6._____ to open a window to stop myself 7._____!
Nowadays air pollution is something that hardly question any more. However, I still can’t walk down the street in any of the big cities without 8._____ that people are 9._____ the air pollution. It is time for the government departments of the world to introduce emission(废气排放) controls on all cars and 10._____ the public transport system(公共交通体系) to encourage people to 11._____ their cars at home. A friend of mine takes flying lesson each morning and it really makes him 12._____ when he climbs above the smog layer(烟雾) and looks down 13._____ it and thinks: “I’m breathing that!” This kind of 14._____ results from the bad management of resources. Waste things can 15._____ should, be treated properly. House building, road 16._____, and industrial development are all earthmoving(or earth-reducing) operations and can change the balances of 17._____ created over millions of years. I would like to 18._____serious studies done on all these main works before they are built. Also, there should be 19._____ national parks set up to keep the most beautiful parts of our countries in their natural 20._____.
.
A．The other B．Another C．Every D．Each
A．asking for B．drinking C．having D．buying
A．seemed B．struck C．sank D．showed
A．ago B．after C．before D．now
A．full B．filled C．crowed D．parked
A．promise B．help C．suggestion D．permission
A．standing B．sitting C．talking D．dying
A．thinking B．persuading C．deciding D．learning
A．suffering B．dying C．walking D．standing
A．increase B．reduce C．improve D．raise
A．wash B．repai C．drive D．leave
A．sick B．tired C．foolish D．excited
A．on B．at C．from D．for
A．discussion B．question C．pollution D．operation
A．but B．yet C．still D．and
A．work B．construction C．building D．setting
A．life B．mind C．human being D．plants
A．see B．start C．enjoy D．pay
A．few B．any C．more D．no
A．situation B．states C．soils D．place
From the earlier time it was well ___1___ to the Peruvians that when a cut ___2___ made in the thick skin of a ___3___ tree, a white liquid like milk came ___4___. From this fluid (流动的) a sticky ___5___ of rubber might be made. This rubber is ___6___ and wax-like when warm so that it is ___7___ to give any form.
The Peruvians ___8___ the discovery that it is very good for ___9___ out water. Then in the early ___10___ of the century they made overshoes to ___11___ their feet dry. Then a certain Mr Mackintosh ___12___ coats of cloth which were ___13___ with rubber. Today Mackintosh raincoats are still ___14___ after him.
But these first rubber shoes ___15___ raincoats were unpleasantly soft and sticky in ___16___. They were also stiff and very ___17___ in winter. They were like wax(蜡) although they ___18___ a bit stronger.
But the rubber ___19___ use today has been improved. It is ___20___ sticky but soft and elastic(弹性的) and strong enough for any season.
1. A. talked B. heard C. seen D. known
2. A. has B. was C. may D. will
3. A. rubber B. apple C. orange D. oak
4. A. from B. through C. out D. up
5. A. raincoat B. shoes C. border D. mass
6. A. hard B. fast C. stubborn D. soft
7. A. important B. impossible C. possible D. uncertain
8. A. made B. found C. wrote D. neglected
9. A. finding B. keeping C. making D. pouring
10. A. kind B. part C. sort D. halves
11. A. clean B. clear C. keep D. prevent
12. A. made B. found C. appeared D. gave
13. A. full B. like C. lined D. applied
14. A. looked B. named C. made D. searched
15. A. or B. and C. with D. but
16. A. today B. summer C. winter D. rain
17. A. soft B. sticky C. elastic D. cold
18. A. felt B. made C. needed D. produced
19. A. Mr Mackintosh B. the Peruvians C. we D. is
20. A. also B. always C. neither D. not
Throughout history man has had to accept the fact that all living things must die. But people now live longer than they 36 . Yet, all living things still show the 37 of aging, which will eventually 38 death.
Aging is not a disease, but as a person passes maturity (成熟期), the cells of the body and the 39 they form do not function as well as they 40 in childhood and teenage years. The body provides less 41 against disease and is more 42 to have accident.
A number of related causes may 43 aging. Some cells of the body have a fairly long life, but they are not 44 when they die. As a person ages, 45 of brain cells and muscle cells decreases. 46 body cells die and are replaced by new cells. In an aging person the 47 cells may not be as workable or as capable 48 growth as those of a young person.
Another 49 in aging may be changes within the cells 50 . Some of the protein chemicals in cells are known 51 with age and become less elastic (有弹性的). This is why the skin of old people wrinkles (皱纹) and 52 . This is also the reason why old people 53 in height. There may be other more important chemical changes in the cells. Some complex cell chemicals, such as DNA and RNA, store and 54 information that the cells need． Aging may affect this 55 and change the information-carrying molecules so that they do not transmit the information as well.
36. A．would B．be used to C．used to D． used
37. A．function B．effect C．affect D． sign
38. A．lead in B．give in C．run into D． result in
39. A．hands B．feet C．heart D． organs
40. A．do B．has done C．did D． had done
41. A．energy B．protection C．vigor D． power
42. A．likely B．probable C．possible D． alike
43. A．attend to B．contribute to C．add to D． devote to
44. A．replaced B．reborn C．recovered D． surrendered
45. A．a number B．the amount C．the number D． a great deal
46. A．The others B．The other C．Another D．Other
47. A．old B．left C．new D． other
48. A．to B．for C．of D． in
49. A．factor B．effect C．reason D． element
50. A．for themselves B．of themselves C．themselves D． on their own
51. A．change B．to have changed C．to change D． to be changed
52. A．hangs loose B．hangs loosely C．is hanging loosely D． is hanging loose
53. A．increase B．shrink C．lengthen D． decrease
54. A．pass away B．pass by C．pass off D． pass on
55. A．improvement B．procession C．approach D． process
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