— I sent him the dictionary by mail this morning . —You that; hes coming tomorrow afte

问题补充：

— 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

答案：

(答案→)A. needn\t have done

B. didn\t have to

C. needn\t do

D. mustn\t do

解析：表示“不必做某事但事实上已做了，”应用“needn\t +不定式的完成式”。