问题
单项选择题
—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
参考答案：C
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，排除。故选C。