—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
考查情態(tài)動(dòng)詞。根據(jù)語境“No”可知“我們沒有等”。根據(jù)“He didn’t return home at all.”說明“我們不必等。”而B項(xiàng)表示已等過。
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