[题目]Scientists think calculating is a necessary skill they base their researches.A.on itB.on thatC.on whichD.on whose 题目和参考答案——青夏教育精英家教网—

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【题目】Scientists think calculating is a necessary skill_________ they base their researches.
A.on it
B.on that
C.on which
D.on whose

【答案】C
【解析】句意：科学家认为计算是一种依据他们的研究为基础的必须技能。 base on....固定短语，“依据......为基础”。a necessary skill做先行词，指物，在后面的定语从句中做on的宾语，故选C。

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A. in favor of B. in charge of

C. in honor of D. in search of

A. were injured

B. would be injured

C. had been injured

D. would have been injured

A. put B. make C. take D. give

【题目】We still have a long way to go to solve all the problems ___________the Yangtze River.
A.regardless of
B.in regard to
C.in search of
D.instead of

——No, you __________. I’ve told him already.

A. needn’t B. wouldn’t

C. mustn’t D. shouldn’t

A. whom B. which

C. what D. that

【题目】I really don't want to talk about______exam we took just now.I'm not in______mood for it.
A.the;the
B.the;a
C.an,a
D.an;the

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