—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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—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 |