Exploringspaceisexciting,yetda

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更新 2022-09-03
科目英语
题型单选题
难度容易
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挑错有奖

Exploring _____space is exciting, yet dangerous.
There is _____need for both robots and humans for space exploration.

A．the; a

B．a; a

C．/; a

D．/; the

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A．although

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A．unless

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A．therefore

B．although

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A．as

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