—What a pity! Their experiment is a failure.
—They better under more favorable conditions.
A. should have done
B. could have done
C. must have done
D. may have done
—What a pity! Their experiment is a failure.—They better under more favorable conditions.
答案:2 悬赏:70 手机版
解决时间 2021-03-21 05:12
- 提问者网友：爱了却不能说
- 2021-03-20 20:53
最佳答案
- 五星知识达人网友：一秋
- 2021-03-20 21:31
A. should have done(答案→)B. could have doneC. must have doneD. may have done解析： 句意：--真遗憾,他们的实验是一个失败.—在更加有利的条件下他们本应该做的更好。这里under more favorable conditions.是一个隐含的虚拟语气,相当于if they had been under more favorable conditions.说明是和过去相反的虚拟条件句,所以主句是could have done“过去本可以做的更好”，所以选B。
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- 1楼网友：罪歌
- 2021-03-20 22:48
感谢回答，我学习了
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