Can animals be made to work for people? Some scientists think that one day animals may be trained (训练)to do a number of simple jobs instead of people. They say that at a circus(杂技场), for example, we may see elephants, m , dogs a:d other animals doing q skillful（熟练的)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 the animal some sugar o a piece of fruit as a reward(报酬). The scientists say that many d animals may be trained to do a lot of simple things if they know they will get a reward f doing that.
Of course，as we know, dogs can be trained to look after a house. and soldiers in both old and modern t have used geese to give warning(警报) by m a lot of noise when an enemy(敌人) comes n .And also it may be possible to train animals to work in families or f.
