题目内容
-Has Tommy finished his homework yet??-I have no idea; he ____ it this morning.
A. was doing B. had been doing
C. has done D. did
A
表示今天上午一直在做作业。
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题目内容
-Has Tommy finished his homework yet??-I have no idea; he ____ it this morning.
A. was doing B. had been doing
C. has done D. did
A
表示今天上午一直在做作业。