Scientistssayitmaybefiveorsixy

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更新 2022-09-03
科目英语
题型单选题
难度中等
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挑错有奖

Scientists say it may be five or six years _____ it is possible to test this medicine on human patients.

A．since

B．after

C．before

D．When

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相关试题

--- I am really struck by your spoken English. You speak so fluently. Have you been abroad?
--- Yes. I _____ in London for two years.

A．have stayed	B．had stayed
C．stayed	D．have been staying

题型：未知
难度：未知

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I don’t think _____ possible to master a foreign language without much memory work.

A．this

B．it

C．which

D．that

题型：未知
难度：未知

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--- Did you have a good time in the US during the Golden Week Holiday?
--- ______ . Due to the temporary shutdown, a lot of national parks were closed.

A．Not really	B．You’re right
C．Oh, great!	D．Yeah, why not?

题型：未知
难度：未知

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You will never gain success ______ you are fully devoted to your work.

A．when	B．because
C．unless	D．after

题型：未知
难度：未知

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The boys, who _____ their homework, were allowed to play basketball on the playground.

A．will finish	B．finish
C．have finished	D．had finished

题型：未知
难度：未知

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