课时同步（外研版）高一上英语必修2 Module2课时练习

选词填空

________hard you try, it is difficult to lose weight without cutting down the amount you eat.

____________wants to stay in a hotel has to pay their own way.

________tomorrow，our ship will set sail for Macao.

The poor young man is ready to accept ________help he can get.

Yoshihiko Noda，Japan's 6th prime Minister，will face even greater challenges ________recovering from the tsunami and the nuclear crisis that followed，________a rising national debt.

His action ________his words；you don't believe in him.

After you finish reading the book，please put it back ________it belongs.

－I'll marry Mike next week.
－________.You have only known him for two months.

Many poor people in Africa died for lack of medical______.

________team wins on Saturday will go through to the national championships.

Shanghai is ________that we can hardly visit all the beautiful scenery in two or three days.

－I think smoking in public places is very bad.
－________.Smoking in public will make nonsmokers uncomfortable.

－There is ________on smoking in this theatre.
－Do you mean smoking ________in this theatre?

The person ________drugs had much difficulty in getting rid of the________.

It was a pity that the great writer died ________his works unfinished.

阅读下面短文，从短文后各题所给的四个选项(A、B、C和D)中，选出可以填入空白处的最佳选项。

It was half an hour before midnight on December 24th last year. I was a ticket-counter supervisor for a major airline and was looking forward to the ____ of my shift(轮班) at Stapleton International Airport in Denver. My wife was waiting up for me at home so that we could ____ our gifts for Christmas.
Just then，a very ____ gentleman went up to me. He asked how he could get to Cheyenne，Wyoming. He had just arrived from Philadelphia and ____ his connecting flight. I pointed him to the ground transportation area，where he could rent a ____.And then I called my wife to let her know I would be home ____.
About fifteen minutes later，the gentleman ____ and informed me that all the buses were full and there were no cars ____.I told him that he had to stay for a night at the airport. Hearing that，he burst into ____.
I tried to make him calm down. He explained that his name was Tom，and that his only son was ___ ill at home and was not expected to ____ another year. He expected that this would likely be the ____ Christmas with his son.
I told Tom to ___ his luggage and wait for me at the gate. I was driving to Cheyenne. I called my wife Kathy，telling her about it and not to wait up for me. I drove fast ___ and we arrived in Cheyenne around 2∶30 a．m.
Kathy was still ___ me when I got home in the early morning. We traded gifts and then our conversation ____ Tom. For Kathy and me，there was no ___ that driving Tom to Cheyenne was the ____ choice.
A couple of days later，I ____ a Christmas card with a picture of Tom and his family. In it，Tom thanked me for the special ____ he had received that holiday season，but I knew the best gift was mine.

A．end B．turn C．role D．change

A．expect B．get C．exchange D．make

A．kind B．helpless C．sad D．worried

A．mistook B．missed C．caught D．continued

A．bus B．flight C．room D．car

A．soon B．late C．early D．lately

A．left B．moved C．came D．returned

A．reliable B．present C．available D．acceptable

A．laughter B．tears C．anger D．sorrow

A．really B．slightly C．seriously D．unluckily

A．suffer B．live C．share D．grow

A．last B．best C．happiest D．hardest

A．hand B．find C．pack D．collect

A．for a while B．all around C．all the way D．from time to time

A．waiting for B．caring for C．thinking of D．depending on

A．remembered B．recalled C．concerned D．contained

A．idea B．doubt C．point D．problem

A．main B．only C．nice D．great

A．received B．sent C．saved D．discovered

A．drive B．help C．deal D．gift

阅读下列短文，从每题所给的四个选项(A、B、C和D)中选出最佳选项。
Medical drugs sometimes cause more damage than they cure. One solution to this problem is to put the drugs inside a capsule，protecting them from the body-and the body from them－until they can be released at just the right spot. There are lots of ways to trigger(引发)this release，including changing temperature，acidity，and so on. But triggers can come with their own risks－burns，for example. Now，researchers in California have designed what could be a harmless trigger to date：shining near-infrared light(NIR，近红外线)on the drug in the capsule.
The idea of using light to liberate the drug in the capsule isn't new. Researchers around the globe have developed polymers(聚合物)and other materials that begin to break down when they absorb either ultraviolet(UV，紫外线)or visible light. But tissues also readily absorb UV and visible light，which means the drug release can be triggered only near the skin，where the light can reach the capsule. NIR light largely passes through tissues，so researchers have tried to use it as a trigger. But few compounds(化合物)absorb NIR well and go through chemical changes.
That changed last year when Adah Almutairi，a chemist at the University of Califomia，San Diego，reported that she and her colleagues had designed a polymer that breaks down when it absorbs NIR light. Their polymer used a commercially available NIRabsorbing group called onitrobenzyl(ONB)．When they catch the light，ONB groups fall off the polymer，leading to its breakdown. But ONB is only a so-so NIR absorber，and it could be poisonous to cells when it separates from the polymer.
So Almutairi and her colleagues reported creating a new material for capsules that's even better. This one consists of a long chain of compounds called cresol groups linked in a polymer. Cresol contains reactive(易反应的)components that make it highly unstable in its polymeric form，a feature Almutairi and her colleagues use to their advantage. After polymerizing the cresols，they cap each reactive component with a light-absorbing compound called Bhc. When the Bhcs absorb NIR light，the reactive groups are exposed and break the long polymer into two short chains. Shining additional light continues this breakdown，potentially releasing any drugs in the capsule. What's more，Almutairi says，Bhc is 10 times better at absorbing NIR than is ONB and is not poisonous to cells.
According to the passage，which of the following could be the best trigger?

Why is ONB unsatisfactory?

Which word can be used to complete the following process of changes?
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