Can animals be made to work for us ? Some scientists think that one day animals may be t__ to do a number of simple jobs .They s_
_ that in a film or on TV we may see elephants , monkeys ,dogs ,bears ,or other animals doing a lot of things .If you w_
__ carefully , you may find that those animals are given something to eat in return for d_
_ them . The scientists say that many d_
__ animals may be taught to do a number of simple jobs if they will get something to eat .
Of course, as we know , dogs can be used to guard a house ,and elephants can be used to do some heavy j_ . And we can also teach animals to work in f_
_ .Apes ,for example have b_
_ used in America to help make cars and scientists b_
_ that these monkeys may one day get in crops and e_
_ drive trains .