题目内容
― Has Sam finished his homework today?
―I have no idea. He ______ it this morning.
A. did B. has done C. was doing D. had done
C
练习册系列答案
相关题目
— Has Sam finished his homework today?
— I have no idea. He ________ it this morning.
|
A．did |
B．was doing |
C．has done |
D．had done |