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

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

(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。