Tony his homework this morning before he went to school.A. has doneB. did C. has doneD.

问题补充：

Tony his homework this morning before he went to school.

A. has done

B. did

C. has done

D. will do

答案：

(答案→)A. has done

B. did

C. has done

D. will do

解析：这题考查时态的用法：时间是before he went to school.说明完成作业是在上学前，用过去完成时，A项had done。正确。