scientistshavelearnedalotabout

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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 have learned a lot about the universe, there is much we still don't know.

A．Once

B．Since

C．Though

D．Unless

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相关试题

-It’s my treat today. Is there any particular meal you would like to have?
- you choose is all right with me.

A．Anything what

B．What

C．Whatever

D．No matter what

题型：未知
难度：未知

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Don’t call me tomorrow evening, for I ____________to a lecture on how to keep a good state of mind when taking an exam.

A．will listen

B．should listen

C．shall listen

D．will be listening

题型：未知
难度：未知

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rise in carbon dioxide is causing steady increase in global warming.

A．不填; a

B．The; a

C．The;不填

D．A；the

题型：未知
难度：未知

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–Would it bother you if I asked for your opinion on this report?
--______.

A．No, I don’t

B．Yes, go ahead

C．Not at all

D．With pleasure

题型：未知
难度：未知

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–When has the country been united as one?
--______1998, I suppose.

A．In

B．From

C．After

D．Since

题型：未知
难度：未知

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