They stayed with me three weeks,_________ we were very happy.选during which还是during which time？为什么？
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They stayed with me three weeks,_________ we were very happy.选during which还是during which time？为什么？ 选during which因为 three weeks已经是时间了，用WHICH就可以了后边不用再?率鞘奔鋞ime
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during