考考你的推理能力

何梦琳

请阅读下面的短文，然后做后面的题目。

Four friends live in a small town. Their names are John, Miller, Smith and Carte. They all have different jobs. One is a policeman, one is a cook, one is a farmer, and one is a doctor. Its Tuesday afternoon. Johns son breaks his leg and John takes him to the doctors. The doctors sister is Smiths wife. The farmer isnt married. He has a lot of hens.

Miller often buys eggs from the farmer. The policeman sees Smith and Miller every day because they are neighbours.

Now guess: Who is the policeman? Who is the cook? Who is the farmer? Who is the doctor?

()1. John is a _______.

A. doctor B. farmer C. policeman D. cook

()2. Miller is a _______.

A. doctor B. policeman C. cook D. farmer

()3. Smith is a _______.

A. farmer B. policeman C. cook D. doctor

()4. Carter is a _______.

A. doctor B. policeman C. cook D. farmer

这是一篇推理性文章，要求根据所给出的提示，猜出各自的职业。答案分别为C、A、C、D。

分析： 1. 因为John 的儿子腿摔断了要去看医生，故可推知John不是doctor。 2. 因为医生的妹妹是Smith的妻子，故Smith不是doctor(否则兄妹结婚，不合情理)。3. 由于 farmer 没有结婚，所以 Smith 和 John 都不是farmer (因为Smith 有妻子，John 有儿子)。4. 因为警察每天看到Smith，所以 Smith不是policeman。