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题型:单项选择题 — What do you want to eat for lunch? I will prepare it earlier today. — You_____, mum. Let’s go out to have something different. A.mustn’tB.can’tC.shouldn’tD.don’t have to 查看答案
题型:单项选择题 We were swimming in the lake ______ suddenly the storm started. [ ]A.when B.while C.because D.before 查看答案