——You didn’t wait for Mr. Black last night, did you?
——No, but we . He didn’t return home at all.
A. couldn’t have
B. needn’t have
C. didn’t need to
D. should wait have
网友回答
A. couldn’t have
B. needn’t have
(答案→)C. didn’t need to
D. should wait have
解析：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。