题目内容


—Mr. Li ______ to Mary carefully when I entered the classroom this morning.

—He is very patient ______ he is young.

A. talking; but B. was talking; though

C. talks; though D. talked; however


【答案】B

【解析】考查动词的时态及连词的用法辨析。句意：——今天早上我进教室的时候，李老师在同玛丽仔细交谈。——虽然他很年轻，但他很有耐心。when引导的过去动作发生时，另一动作正在发生用过去进行时；though意为“虽然”用来引导让步状语从句


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In some cities the rubbish is collected and taken outside of city to a dump. Often the city dump is placed where the ground is low or there is a big hole. The kitchen rubbish is broken into small pieces and sent into the sewage system. The sewage system takes away the used water from toilets, bathtubs and other places.

To keep mice and flies away, some earth is used to cover the newly dumped rubbish. Later, grass may be planted on the rubbish-filled land. Finally, a house or a school may be built there, and then you'd never know that this had once been an old rubbish dump.

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B. to explain the need for rubbish collection

C. to introduce different ways to treat rubbish

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   —Since 2004.

A. been to Beijing         B. become a policeman        

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