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  3. Can animals be made to work for us? Some scientists think that one day animals may be taught to do a number of simple jobs. They

Can animals be made to work for us? Some scientists think that one day animals may be taught to do a number of simple jobs. They

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问题 Can animals be made to work for us? Some scientists think that one day animals may be taught to do a number of simple jobs. They say that in a film or on TV we may see elephants, or monkeys, dogs, bears, or other animals doing a lot of things. If you watch carefully, you may find that those animals are always given something to eat in return for doing them. The scientists say that many different  animals may be taught to do a number of simple jobs if they know they will get something to eat in return.      Of course, as we know, dogs can be used to guard a house, and elephants can be used to do some heavy jobs. And we can also teach animals to work in factories. Apes(猿猴), for example, have been used in America to help make cars and scientists believe that these large monkeys may one day get in crops and even drive trains.
选项 A、they can eat a lot
B、they are very heavy, too
C、they are very strong
答案C
解析 题干的意思是大象为什么能用来做一些重活。A的意思是它们能吃很多，B的意思是它们自己也很重，C的意思是它们很强壮。通过常识判断，可以知道吃得多、本身重跟能干重活没有太大关系，强壮才有干重活的可能，故正确答案为C。
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