Can animals be made to work for us?Some scientists think that one day animals may be trained to d

Can animals be made to work for us?Some scientists think that one day animals may be trained to d
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.