---- 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
-Has Sam finished his homework today?-- I have no idea. He it this morning.A. didB
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解决时间 2021-04-05 12:46
- 提问者网友：龅牙恐龙妹
- 2021-04-05 04:03
最佳答案
- 五星知识达人网友：等灯
- 2021-04-05 04:37
A. didB. has done(答案→)C. was doingD. had done解析：考查时态。句意：今天Sam完成作业了吗？我不知道，他今天上午在做。表示过去某一时刻进行的动作用过去进行时态。根据题意上午那个时刻他在做作业，故选C。
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- 1楼网友：冷風如刀
- 2021-04-05 06:13
这个解释是对的
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