Question

   Can animals be made 1. (work) for us? Some scientists think that one day animals may be trained to do a number of simple jobs that 2. (be) now done by human beings.

   They point 3. 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 4. (close) , you may notice that the trainer always gives the animal a piece of candy or a piece of fruit 5. a reward. The scientists say that many 6. (differ) animals may be trained to do a number of simple jobs if they know they will get a reward for 7. (do) them.

   Of course,as we know,dogs can be used to guard a house,and soldiers in both old and modem times have used geese to give 8. (warn) by making a lot of noise when a stranger or an enemy comes near. And 9. may be possible to train animals to work in factories. In Russia,for example,pigeons,10. are birds with good eyesight,are being used to watch out for faults in small steel balls that are being made in one factory.

Answer 1

1. to work。考查不定式作补语的用 法。使役i词make用于被动语态 时，要用带to的不定式作补语，故 填 to work。

2. are。考查一般现在时和主谓一 致。此处描述客观事实，且that指 代jobs ,故填are。

3. out。考查副词。point out意为“指 出”

4. closely。考查副词。设空处修饰谓 语动词watch,故用副词closely。

5. as。考查介词。根据句意此处用介 词as ,意思是“作为”。

6. different。考查形容词作定语的用 法。设空处修饰名词animals ,故填 形容词different。

7. doing。考查动词-ing形式作宾语的用法。介词后需跟动词-ing形式 作宾语，故填doing。

8. waming (s) 。考查名词。设空处作 give的宾语且意为“警告”，故填 waming (s) 。

9. it。考章it的用法。设空处为形式 主语，故填it。

10. which。考查关系词。设空处引导 非限制性定语从句修饰pigeons , 且在从句中作主语，故填which。