You didn't wait for Mr. Smith last night,did you?
-Youdidn'twaitforMr.Smithlastnight,didyou?-Yes,butwe__.Hedidn'treturnhomeatall.A.don'...
-You didn't wait for Mr. Smith last night,did you?
-Yes,but we__.He didn't return home at all.
A. don't have to
B. needn't have
C. didn't need to
D. should have
正确答案是B,求详细的讲解 展开
-Yes,but we__.He didn't return home at all.
A. don't have to
B. needn't have
C. didn't need to
D. should have
正确答案是B,求详细的讲解 展开
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