Can animals be made to work for people?…… 还有为什么写这个答案的原因

Can animals be made to work for people?…… 还有为什么写这个答案的原因
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 i__1__ of people.They say that at a circus（杂技场）,for example,we may see elephants,monkeys,dogs and other animals doing q__2__ skillful（熟练的）things at a circus.
If you watch closely,you may find that the trainer（驯兽员）always g__3__ the animal some sugar or a piece of fruit as a reward（报酬）.The scientists say that many d__4__ animals may be trained to do a lot of simple things if they know they will get a reward f__5__ doing that.
Of course,as we know,dogs can be trained to look after a house,and soldiers in both old and modern times have used geese to give warning by m__6__ a lot of noise when an enemy comes near.And also it may be possible to train animals to work in families or f __7__.
Many blind people have seeing Eye dogs to guide them.But not Flsie Schneider.She has a seeing eye cat called Rhubard!Mrs.Schneider said "At first I had the cat on a ten-foot leash.It would take me to the trash cans and out to the clothesilne.Now,it k__8__ exactly what to do —— even without a leash.Rhubarb guides me d__9__ the stairs." said Mrs.Schneider."It even gives me a little meow if I come too c__10__ to the wall or door."