At no time during his speech ________ that he would make another film soon.A.he mentioned B.he should mention C.did he mention D.should he mention这道题正确答案选择C,请哪位老师解答一下,为什么呢?

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At no time during his speech ________ that he would make another film soon.
A.he mentioned
B.he should mention
C.did he mention
D.should he mention
这道题正确答案选择C,请哪位老师解答一下,为什么呢?

这是no time 否定词位于句首的倒装,部分倒装
时态从后面看出是过去式,因此用did助动词