．— Has Tom finished his report so far? — I have no idea．He it this morning．A. didB. has do

问题补充：

．— Has Tom finished his report so far?

— I have no idea．He it this morning．

A. did

B. has done

C. was doing

D. had done

答案：

A. did

B. has done

(答案→)C. was doing

D. had done

解析：考查时态，句意：--汤姆到现在完成报告了吗？--我不知道，他今天早上正在写。过去进行时表示过去正在做的动作，但不一定完成，和句意相符，选C。