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heusedtodo用什么反问usen'the还是didn'the这两个选项都有···?

题目详情
he used to do 用什么反问
usen't he 还是 didn't he 这两个选项都有···?
▼优质解答
答案和解析
用didn't he
used to do,是一般过去式,所用以didn't he