41. It was _______ who helped Tom out when he was in trouble. 本文来自Kaixin100

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　　43.—Will you go to the museum tomorrow? 本文来自Kaixin100

　　—Yes, I will go _______ it’s windy.

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　　48. I regretted _______ the days when I _______ hard at school.

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　　A. wasting…must have worked B. having wasted…should have worked

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　　C. to waste…could work D. to have wasted…would work

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