Can animals be made to work for people? Some scientists think that one day animals may be trained to do a number of simple jobs i_________ （1） of people. They say that at a circus （杂技场）， for e__________（2）， we may see elephants, monkeys, dogs and other animals doing q ________（3） skillful things. Perhaps you have seen them on the television or in a film. If you watch closely , you may find that the trainer （驯兽员）always g ________（4） the animal some sugar o r a piece of fruit as a reward. The scientists say that many d_________ （5） animals may be trained to do a lot of simple things if they know they will get a reward f________ （6） doing that.
Of course, as we know, dogs can be trained to l__________（7） after a house, and soldiers in both old and modern t __________（8） have used geese to give warning （警报） by m _________（9） a lot of noise when an enemy comes near. And also it may be possible to train animals to work in families or f ____________ （10）。
1.______ 2.______ 3. ______ 4 .______ 5. ______ 6._______ 7.______
8. ______ 9.________ 10. _______
KEYS: 1. instead 2. example 3. quite 4.gives 5. different 6. for
7. look 8. times 9. making 10. factories