A If we laid all of the blood vessels（血管）in the human body end to end，they would reach about 100，000km long． That's nearly two and a half times around Earth!	B For the first time， Coca﹣cola has showed that it uses 3，000，000 tons of plastic bottles each year． That 's the weight of 15，000 blue whales﹣ the largest animal on Earth．	C If your throat tickles（发痒）， pressing your ear might make it go away． That's because your throat and ears share the same group of nerves（神经）． When you press your ear，the nerves in your throat can feel it．
D It takes about 7 to 8 trees to make enough O 2for one person to breathe for a year． Each person needs around 750 kg of O 2per year．A large tree might make around 100kg of O 2per year．	E To young children． a year might seen to last forever． But older people might say that it flies by． Why is that？ According to the US scientists， young people's brains deal with information faster than older people． They take in more information and do more things in a day． So they feel like each day last longer． However， older people's brains take in less information and see a day pass more quickly．	F About 200 muscles（肌肉）work together when you take a step． That 's a lot of work for your muscles， since many people take about 10，000 steps a day．If you want to get some easy exercise， walking is good for you．

（1）Match passages A﹣F with the two topics： ①People & Surroundings；②The Human Body． Which of the following is right？ 　　

A．	①﹣AB；②﹣CDEF
B．	①﹣BDF；②﹣ACE
C．	①﹣BD；②﹣ACEF

（2）What's the best title for all the six passages？ 　　

A．	Surprising World
B．	Amazing Facts
C．	Unbelievable Figures

（3）Why does the editor present readers the six passages？ 　　

A．	To heop readers know more about human body and environmental protection．
B．	To ask readers to protect the environment and take more exercise．
C．	To tell readers to have less unhealthy drink and plant more trees．

（4）Which of the following questions is answered in the passages？

A．	Why do kids and older people feel a year differently？
B．	Why could a large tree produce about 100 kg of O 2per year？
C．	How do our 200 muscles work together when we take a step？

（5）Which of the following leads to the figure"30，000"？ 　　

A．	The amount of muscles working together by taking 150 steps．
B．	The length of vesscles in 3 human bodies joining together．
C．	The weight of O 2for 40 persons to breathe a year．