--Has the train arrived yet?---No, it ought to twenty minutes ago.A. arriveB. have arrive

发布时间：2020-08-15 01:11:56

--Has the train arrived yet?---No, it ought to twenty minutes ago.
A. arrive
B. have arrived
C. be arriving
D. be arrive

网友回答

A. arrive
(答案→)B. have arrived
C. be arriving
D. be arrive
解析：ought to have done=should have done表示:本应该做却没有做.

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