—I don’t suppose they could have finished their experiment, they?— ,
题型：不详难度：来源：
—I don’t suppose they could have finished their experiment, they?
— , they are still doing it in the lab.| A．could; Yes | B．didn’t; No | C．have; No | D．couldn’t; Yes |
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答案
| C |
解析
| 本题考查反义疑问句。句中主语为第一人称，且为否定，故从句为否定转移，故用have they.句意：——我认为他们不可能完成他们的实验，是吗？——是的，他们仍然在实验室做实验。 |
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