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—You didn’t wait for Mr. Black last night, did you?
—No, but we ____. He didn’t return home at all.
A.couldn’t haveB.needn’t have
C.didn’t need toD.should wait have
C
考查情态动词。根据语境“No”可知“我们没有等”。根据“He didn’t return home at all.”说明“我们不必等。”而B项表示已等过。
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