A If the experiment succeeds or fails, it will B provide us with valuable C experience, which is essential to D improving our fu

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

选项 A、 
B、 
C、 
D、 

答案A

解析 应改为whether。if不能引导让步状语从句。本句的意思是:“无论这个实验是成功还是失败,都会给我们提供宝贵的经验,而这对于改善我们未来的工作是至关重要的。”
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