Question

. — I sent him the dictionary by mail this morning .

—You ____ that; he''s coming tomorrow afternoon .

A . needn''t have done   B . didn''t have to    C . needn''t do   D . mustn''t do

Answer 1

A

解析:

表示“不必做某事但事實上已做了，”應用“needn''t +不定式的完成式”