(If) the experiment succeeds or fails, it will (provide us with) (valuable) experience, which is essential to (improving) our fu

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问题 (If) the experiment succeeds or fails, it will (provide us with) (valuable) experience, which is essential to (improving) our future work.

选项 A、If
B、provide us with
C、valuable
D、improving

答案A

解析 应改为Whether。whether可以与or搭配,if 不可以,whether表“是否,不管”时可以置于句首。
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