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John promised his doctor he____not smoke,and he has smoked ever since.A.might B.should C.could D.would题目是否有错,为什么不是and he has not smoked ever since

题目详情
John promised his doctor he____not smoke,and he has smoked ever since.
A.might B.should C.could D.would
题目是否有错,为什么不是and he has not smoked ever since
▼优质解答
答案和解析
D
宾语从句主句中的promised是过去时,所以从句部分就用would,不能用will 或者其它选项.