题目内容

掀起全国范围大革命高潮的起点是()。

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Some 200 ____ were presented at the conference.

A. paper
B. pieces of paper
C. papers
D. pieces of papers

Please supply it to those ___ running short.

A. food is
B. whose food is
C. foods are
D. whose foods are

Seventy percent ___ well-educated in this area.

A. is
B. are
C. has
D. have

Our committee ___ considered your request.

A. have
B. has
C. having
D. having been

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