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  3. It was very kind of you to clean the off

It was very kind of you to clean the off

考试题库2022-08-02  24
问题 It was very kind of you to clean the office, though you ____.（　　）A． needn’t do B． wouldn’t have C． didn’t have to D． mustn’t have done
选项 A． needn’t do
B． wouldn’t have
C． didn’t have to
D． mustn’t have done
答案 C
解析 have to表示“不得不”，前加否定，表示“用不着”。
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