题目内容

Early to bed and early to rise makes a man healthy, wealthy and wise.

This is an old English saying. Do you know it before? It says that we must go to bed early and get up early in the morning. Then we should be healthy. We should also be rich (wealthy) and clever (wise).

This is true. The body must have enough sleep to be healthy. Children of a young age should have ten hours' sleep every night. Children who don't have enough sleep can't do their work very well.They will not be wise and they may not become wealthy!

The body also needs exercise. Walking, running, jumping, swimming and playing games are all exercise. Exercise keeps the body strong.

Exercise also keeps the blood(血液)moving around inside the body. This is very important. Our blood takes food to all parts of our body. The head also needs blood. Exercise helps us to think better!

1. If a child doesn't have 10 hours' sleep every night, he .

A. will become wise

B. won't do well in his work

C. will have to sleep in the daytime

D. can't go to school in time

2.A person needs exercise because .

A. it makes him healthy B. it has much blood

C. it doesn't need time D. it is fun to do exercise

3. Exercise makes the move quickly and smoothly.

A. body B. water C. blood D. head

4. Which of the following is not true?

A. Exercise is good for a person's thinking.

B. A student should have 10 hours' sleep.

C. It's good for you to get up early and go to bed early.

D. If you have enough blood, you'll be wise.

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On June 26, 2000, two scientists, called Francis Collins and Craig Venter, told the world that they could now read the whole "map" of the human body: DNA. DNA is something that everybody has, and it tells the body what to do. DNA is the reason that we look like our mother and father, because we get some of their DNA to make our own.

People have been trying to understand the human body for a long time. In 1860, Gregor Mendel discovered a special reason why we look the same as other people in our family. It is because of small things named "genes" in our body. In 1953, James Watson and Francis Crick made another discovery and found out that those small parts are real messages written in the DNA with a special language.

In 1961, Marshall Nirenberg and Johann Matthaei found a message in DNA showing how DNA tells the cell(细胞)to build its parts. Scientists have now found all the words in the DNA map, but we still do not understand what they all do. By understanding what just one "word" means, we can help save more people from several illnesses.

Most people hope that this will help make better medicine and help sick people. Other people worry that when people begin to know more words and find out lots of other information, we might use it in a wrong way, just to make people more attractive, or stop sick people from getting jobs. Man would have to meet a lot of trouble if DNA technology(技术)wasn't limited(限制)in use.

1.When did we first know why we look like other people in our family?

A. In 2000. B. In 1953. C. In 1961. D. In 1860.

2.What did the two scientists first discover in 1961?

A. The "map" of DNA.

B. A new illness.

C. A message of DNA.

D. The language of DNA.

3.What can we do if we understand some "words" of the language inside the body?

A. Make people get new jobs.

B. Make medicine for illnesses.

C. Make maps of human.

D. Make people less attractive.

4.What do people think about this work?

A. It can cause good or bad results.

B. It can cause only good results.

C. It can cause good results but won't work.

D. It can cause only bad results.

12.(A)
  Jerry went to a barber's shop and had his hair cut,but when he came out,he was not happy with the result.When his friend Jack saw him,he said in surprise,"What has happened to your hair,Jerry?"
  Jerry said,"I tried a new barber's shop today,because I wasn't quite pleased with my old one.But this one seems even worse."
  Jack agreed."Yes.I think you are right.Jerry.Now I'll tell you what to do when you go into a barber's shop next time:look at all the barbers'hair,find out whose hair looks the worst,and then go straight to him."
"Why shall I go to him?But that would be foolish!"
"Oh.no.it wouldn't."answered Jack."Who cut that man's hair?Just think it over.He couldn't cut it himself,could he?Another of the barbers cut it.So you know he can't be the worst barber."
36.When Jerry went out of the barber's shop.He was not happy becauseB.
A.nobody had cut his hair
B.the barber hadn't cut his hair well
C.he was satisfied with his old barber
D.the barber had cut his hair carefully
37.Jerry said that he had tried a new barber's shop that day.He meantD
A.the barber's shop was a new one
B.that was the only barber's shop in his town
C.Jerry often were to this barber's shop
D.Jerry had not been to that barber's shop before
38.After Jerry had his hair cut,he thoughtC
A.the new barber's shop was the best one
B.the old barber's shop wasn't so good as the new one
C.the new barber's shop was worse than tile old one
D.the old barber's shop was the worst one
39.Jack told Jerry to find out which barber's hair looked the worst and then go straight to him becauseD
A.he was certainly the best barber         B.he was free all the time
C.he was the worst barber                  D.he wasn't the worst barber
40.From the story we know thatB.
A.it's foolish to have one's hair cut at a barber's shop
B.barbers cut each other's hair
C.barbers never have their hair cut
D.a barber always cuts his hair by himself.

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