摘要： --- Has Sam finished his homework today? --- I have no idea. He it this morning. A. was doing B. has done C. did D. had done 嘉定
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—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
查看习题详情和答案>>— 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
查看习题详情和答案>>― 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
查看习题详情和答案>>