—Theexperimentseemsdifficult.Wouldyouminddoingitforme?...

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—The experiment seems difficult. Would you mind doing it for me?

—Why not do it by yourself? I show you how to do it if necessary.

A. can B. needn’t C. must D. shouldn’t

【解析】考查情态动词辨析。句意：-这个实验看上去很难，你介意帮我做吗？-为什么不自己做呢？必要时我们可以给你展示怎么做。can“能”；needn’t“不需要”；must“必须”；shouldn’t“不应该”。根据句意，故选A。