阅读下面短文，掌握其大意，然后从第36至第55小题所给的A、B、C、D四个选项中，选出最佳选项，并在答题卡上将该项涂黑。                         

Washoe is a young chimpanzee(黑猩猩). She is no 36 chimpanzee, though. Scientists are doing a research 37her. They want to see how civilized(驯化)she can 38 Already she does many things a human being can do.

　　For example, she has been learning how to exchange 39with people. The scientists are teaching her 40language. When she wants to be picked 41, Washoe points up with one finger. She rubs her teeth with her finger 42she wants to brush her teeth. This is done after every meal.

　　Washoe has also been 43to think out and find answers to problems. Once she was put in a 44with food hanging from the ceiling. It was too high to 45 . After she considered the 46 she got a tall box to stand 47The food was still too high to be reached.Washoe found a 48pole. Then she climbed onto the49, grasped the pole, and 50 down the food with the pole.

Washoe 51 like a human, too. The scientists keep her in a fully furnished(家具齐全的)house. After a hard 52in the laboratory, she goes home. 53 she plays with her toys. She 54 enjoys watching television before going to bed.

　　Scientists hope to 55 more about people by studying our closest,relative(亲属)—chimpanzee.

A.foolish　　　  B.ordinary　　　  C.special　　　   D.simple

A.for　　　　　 B.by　　　　　　 C.to　　　　  　 D.on

A.experience　   B.change　　　　 C.develop　　　  D.become

A.actions　　　  B.views　　　　  C.messages　　   D.feelings

A.sign　　　　  B.human　　　　 C.spoken　　　   D.foreign

A.out　　　　　 B.at　　　　　　 C.on　　　　　  D.up

A.when　　　　 B.until　　　　   C.since　　　　  D.while

A.raised　　　  B.trained　　　    C.ordered　　　  D.led

A.cave　　　　 B.zoo　　　　　   C.room　　　   D.museum

A.pull　　　　  B.see　　　　　  C.eat　　　　   D.reach

A.problem　　　B.position　　　  C.food　　　　  D.ceiling

A.by　　　　　 B.on　　　　　　C.up　　　　    D.with

A.straight　　   B.strong　　　　 C.long　　　　  D.big

A.wall　　　　  B.box　　　　　 C.ceiling　　　  D.pole

A.knocked　　　 B.picked　　　　 C.took　　　　  D.shook

A.lives　　　　  B.acts　　　　　 C.thinks　　　   D.plays

A.task　　　　  B.lesson　　　　 C.day　　　   　D.time

A.Here　　　　 B.There　　　　  C.So　　　　    DThen

A.quite　　　　 B.already　　　   C.even　　　　  D.still

A.observe　　　B.discover　　　   C.gain　　　　  D.learn

    You believe that all liquids flow downwards, don't you? Try the　　 following experiment and you will think again.

    Get a bottle filled with the gas helium (氦) and plug it up. Cool　　 it to a very low temperature. The gas will form a liquid. Now pull out　　 the plug at the top. You will be astonished to see the liquid　　 immediately escape by moving up the inner side of the bottle and then　　 down the outer side. If you want to fill a bottle with liquid helium,　　 simply stand it in the liquid. The liquid will start climbing into the　　 bottle by itself until the levels outside and inside are the same.

    So, the first requisite for a scientist is: DO NOT TAKE ANYTHING　　 FOR GRANTED.

   (1) What is the major difference between liquid helium and other liquids?　　　　　　　　　　　　　　　　　　　　　　　　   ［　　］ 　　   A. It becomes active at a very low temperature. 　　   B. It can escape from a closed bottle. 　　   C. It moves upwards as well as downwards. 　　   D. It moves upwards instead of downwards.  　　(2) What will happen if you pull out the plug of the small bottle 　　   which is inside the big jar in Figure 1? Which picture in 　　   Figure 2 represents (表示) the result?　　　　　　  ［　　］ 　　　　  　　(3) What is the main purpose of the passage?　　　　　　［　　］ 　　   A. To teach people a lesson in chemistry. 　　   B. To tell people how to do an experiment. 　　   C. To interest people in an unusual scientific fact. 　　   D. To encourage people to ask for facts to support correct 　　　　  statement (陈述).

Tom's mother tried hard to persuade him to 　　  from his intention to invest his savings in stock market.

　　 A. pull out　　   B. give up　　　　  C. draw in　　　　　　  D. back away