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。考查不定式作補語的用 法。使役i詞make用于被動語態 時，要用帶to的不定式作補語，故 填 to work。

2. are。考查一般現在時和主謂一 致。此處描述客觀事實，且that指 代jobs ,故填are。

3. out。考查副詞。point out意為“指 出”

4. closely。考查副詞。設空處修飾謂 語動詞watch,故用副詞closely。

5. as。考查介詞。根據句意此處用介 詞as ,意思是“作為”。

6. different。考查形容詞作定語的用 法。設空處修飾名詞animals ,故填 形容詞different。

7. doing。考查動詞-ing形式作賓語的用法。介詞后需跟動詞-ing形式 作賓語，故填doing。

8. waming (s) 。考查名詞。設空處作 give的賓語且意為“警告”，故填 waming (s) 。

9. it。考章it的用法。設空處為形式 主語，故填it。

10. which。考查關系詞。設空處引導 非限制性定語從句修飾pigeons , 且在從句中作主語，故填which。