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 a reward for doing them.
Of course, as we know, dogs can be used to guard a house, and soldiers in both old and modern times have used geese to give warning by making a lot of noise when a stranger or an enemy comes near. But it may be possible to train animals to work in factories. In Russia, for example, pigeons which are birds with good eyesight, are being used to watch out for faults in small steel balls that are being made in one factory. When the pigeon sees a ball which looks different from others, it touches a steel plate with its beak. This turns on a light to warn people in the factory. At the same time a few seeds are given as a reward. It takes three to five weeks to train a pigeon to do this and one pigeon can inspect 3,000 to 4,000 balls an hour.
Apes have been used in America in helping to make cars, and scientists believe that these large monkeys may be one day gather crops and even drive trains.
根据以上内容,回答下面试题.
第47题单选 What made scientists think animal can be made to work for us one day?
A. Animals are very skillful at a circus.
B.They are big and strong.
C.Some animals are as clever as human beings.
D.Animals can be trained because they like to get something as a reward.
第48题单选 The trainer usually gives the animal a piece of candy or fruit__________.
A.when it is hungry
B.before it plays a trick
C.when it starts to play a trick
D.after it has done the trick
第49题单选 Many animals may be trained to do simple jobs if they know___________.
A.who their trainers are
B.they will be praised by their trainers
C.they will get a reward
D.something dangerous will happen to them
第50题单选 Which of the following is NOT true?
A. Scientists consider apes may drive trains some day.
B.Apes have worked in some factories.
C.Apes may one day be used to gather crops.
D.An ape is not a large monkey.
五、补全对话(共5句;每句满分为3分，共15分。)
根据中文提示，将对话中缺少的内容写在线上。这些句子必须符合英语表达习惯。打句号的地方，用陈述句;打问号的地方，用疑问句。
提示：Charles一周前开始背疼，他今天早上去看医生。医生检查后告诉他卧床休息两天，就会感觉好一些。他问医生是否吃点药，医生给他一些药，告诉他一天吃三次，每次吃一片。
根据以上内容,回答下面试题.
第51题简答 第51应填入______
第52题简答 第52应填入______
第53题简答 第53应填入______
第54题简答 第54应填入______
第55题简答 第55应填入______
六、书面表达(满分30分)
第56题简答 根据所给内容，写一篇100词左右的便条。
你是Alice。你的朋友Bonnie很快就要到你的乡间小屋拜访，但你却要出去一会儿。留一
张便条给她，告诉她食品在哪儿，告诉她一个人在屋里时应注意些什么。
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