18．When we have small cuts in the skin.something strange may happen．The cuts are able to heal themse——青夏教育精英家教网——

18．When we have small cuts in the skin（皮肤），something strange may happen．The cuts are able to heal （疫愈）themselves in a couple of days．How does this happen？Read on，and you will find out the secret．
Every living thing on the earth is made up of cells（细胞）．Cells grow and make new cells．Most cells are very tiny and we can't see them with our eyes．Different cells have different uses．Our skin cells are special ones．The cells on the surface（表面）of our skin are old dead cells．New skin cells are right under the surface．These are the living skin cells．They do work for our bodies．They help protect our bodies and heal cuts．
Our bodies make skin cells all the time．As the old cells fall off，new cells grow in the same place．Each person makes about 18kg of skin cells during his or her life．Surface skin cells fit together closely with no gaps between them．When you cut or burn yourself，you can harm （伤害） your skin cells．A small cut will not do much harm．Your skin will quickly heal itself by making new skin cells．How do skin cells work？First，the cells near the cut get bigger and move into the gap．Next，these bigger cells meet in the middle．They form a new layer（层）of skin cells．Finally，new cells will grow until the gap disappears completely．In this way，your skin can grow and get well itself．
How amazing the tiny cells are!Next time you have a cut，don't worry about it．Maybe in a few days，you will be surprised to find it healed．

62．The underlined word"gaps"in the passage means"C"in Chinese．
A．突起
B．条纹
C．缝隙
D 差距
63．From the passage，we know thatB．
A．cells are large and we can see them with our eyes
B．cells can grow and make new cells
C．cells aren't in most living things
D．cells near the cut get smaller and move into the gap．
64．Which of the following is TRUE according to the passage？B
A．Each person can make 18kg of skin cells every day．
B．Different cells have different uses in our bodies．
C．The skin cells have little work to do in the body．
D．We can see most cells with our eyes．
65．The best title for this passage should beA．
A．HOW SKIN CELLS HEAL CUTS
B．THE IMPORTANCE OF SKIN
C．HOW TO PROTECT OUR FINGERS
D．THE WAY OF MAKING CELLS．

17．Shenzhou X and three astronauts（宇航员） were sent up from Jiuquan Satellite Launch Center，Gansu province，into a clear blue sky on Tuesday，bringing the nation one step closer to building its own space（太空） station in 2020．
Two men，mission commander（指挥官） Nie Haisheng and Zhang Xiaoguang，and China's second female astronaut，Wang Yaping，are expected to stay in space for 15days．
They will teach young people about science and do two space dockings，between Shenzhou X and the unmanned Tiangong-1space module，a technically difficult procedure that brings two spaceship together in high-speed orbit（轨道）．
The trip is our country's fifth manned space mission，10years after the country's first astronaut，Yang Liwei，went into space in 2003．

54．How long will they stay in space？B
A．About a week
B．About two weeks
C．About a month
D．About two months
55．What will they do in space？They willD．
A．Tach young people about science
B．take some photos
C．do two space dockings
D．Both A and C
56．What's the meaning of the underlined phrase‘space dockings'？B
A．太空实验
B．太空对接
C．太空垃圾
D．太空站
57．Who is the first astronaut to enter space in China？D
A．Nie Haisheng
B．Zhang Xiaoguang
C．Wang Yaping
D．Yang Liwei．

16．What ______ you ______ when the telephone rang just now？（　　）

15．-I had a fight with my brother this morning．
-_________（　　）

	A．	That's nothing．		B．	Great!You are right．
	C．	You should say sorry to him．		D．	You did well

14．Don't ________ it．Let's have a try again．（　　）

13．-You _______ write him a letter to say you are sorry for it．
-I'm not good at writing letters．I want to talk about it _______ the phone．（　　）

12．She didn't go to sleep_____ her mother came back．（　　）

11．I _______ e-mails to my pen pal when Susan called me last night．（　　）

10．After school he didn't go home________ he went to the Internet café．（　　）

9．______ exercise you take，______ you'll be．（　　）

	A．	The fewer； the fatter		B．	The less； the fatter
	C．	The less； the more fatter		D．	The fewer； the more fatter

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