题目内容
My sister met him at the Grand Theatre yesterday afternoon, so he ________ your lecture.
[ ]
A.couldn't have attended
B.needn't have attended
C.mustn't have attended
D.shouldn't have attended
答案:A
提示:
提示:
|
“ couldn't have+过去分词”表示对过去情况的否定推测,不可用must. |
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