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　　Passage 2

　　Can animals be made to work for us？ Some scientists think that one day animals may be trained to do a number of simple jobs that are now done by human beings.

　　They point out that at a circus， for example， we may see elephants， monkeys， dogs and other animals doing quite skillful things. Perhaps you have seen them on the television or in a film. If you watch closely， you may notice that the trainer always gives the animal a piece of candy or a piece of fruit as a reward. The scientists say that many different animals may be trained to do a number of simple jobs if they know they will get reward for doing them.

　　Of course， as we know， dogs can be used to guard a house， and soldiers in both old and modern times have used geese to give warning by making a lot of noise when a stranger or an enemy comes near. But it may be possible to train animals to work in factories， In Russia， for example， pigeons， which are birdswith good eyesight， are being used to watch out for faults in small steel balls that are being made in one factory. When the pigeon sees a ball which looks different from others， it touches a steel plate with its beak （鸟嘴）。 This turns on a light to warn people in the factory. At the same time a few seeds are given as a reward. It takes three to five weeks to train a pigeon to do this and one pigeon can inspect 3，000 to 4，000 balls an hour.

　　Apes （类人猿） have been used in American in helping to make cars， and scientists believe that these large monkeys maybe one day gather crops and even drive trains.

　　1. What made scientists think animals can be made to work for us one day？

　　A. Animals are very skillful at a circus.

　　B. They are big and strong.

　　C. Some animals are as clever as human beings.

　　D. Animals can be trained because they like to get something as a reward.

　　scientists 科学家

　　What made scientists think 什么使得科学家认为什么 a number of +可数名词复数

　　reward 报酬，奖励

　　2. The trainer usually gives the animal a piece of candy or fruit ______.

　　A. when it is hungry

　　B. before it plays a trick

　　C. when it starts to play a trick

　　D. after it has done the trick

　　skillful things在此相当于问题里面的trick（把戏，戏法）

　　3. The “reward” in the passage means ______.

　　A. an honour given for doing something

　　B. money paid for doing something

　　C. attention paid to good conduct

　　D. something given in return for work

　　honour 荣誉

　　conduct n 行为，品行

　　v 领导，指导

　　4. Many animals may be trained to do simple jobs if they know ______.

　　A. who their trainers are

　　B. they will be praised by their trainers

　　C. they will get a reward

　　D. something dangerous will happen to them

　　dangerous 危险的

　　5. Which of the following is not true？

　　A. Scientists consider apes may drive trains some day.

　　B. Apes have worked in some factories.

　　C. Apes may one day be used to gather crops.

　　D. An ape is not a large monkey.

　　monkey 猴子

　　geese 鹅

　　make a noise 发出声音

　　watch out： 戒备、提防（可能发生的麻烦）

　　eg. Watch out！ There's a car coming. 小心！汽车来了。

　　Watch out for sb./sth.： 警惕或注意某人（某事物）

　　eg. The staff were asked to watch out for forged banknotes.

　　已经要求职员留意伪钞。

　　which looks different from others（定语从句，修饰前面的ball）

　　turn on 开