题目内容

He talks as if he___ (do) all the work himself, but in fact Tom and I did most of it.

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I wish I___ (know) what’s wrong with mycar.

If you ______ (not take) those photos, you wouldn’t have been arrested.

气缸内作用有很大的_负荷和_负荷

气缸在结构上，是由_和_组成