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题型：单选题题类：常考题难易度：普通

北京市第四中学2016-2017学年高二下学期期中考试英语试题

He __________ everywhere for materials and finally his efforts paid off. The medicine __________ to be very effective.

A、looked; was proved B、explored; was proved C、sought; has proved D、hunted; was proving

举一反三

If steel is heavier than water, why are ships able to on the sea?

You'll feel much better if you_______ the pills.

The shop assistant was dismissed as she was_______ of cheating customers.

The hero's sacrifices for the county were never officially ______, which made all of us feel discouraged.

It doesn't matter where the students associations get their money from; what ____ is what they do with it.

The heart is believed to _____blood into veins(血管) which are netted all over the body, thus keeping a person alive.

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