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It’s uncertain______the experiment is worth doing.A、ifB、thatC、whetherD、howC
It’s uncertain______the experiment is worth doing.A、ifB、thatC、whetherD、howC
游客
2023-11-20
59
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问题
It’s uncertain______the experiment is worth doing.
选项
A、if
B、that
C、whether
D、how
答案
C
解析
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