——You didn’t wait for Mr. Black last night did you? ——No but we . He didn’t return home

问题补充：

——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

答案：

A. couldn’t have

B. needn’t have

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。