问题

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

正确答案是：

同类题型

34．—Has your father got up?—Sorry, I’m not sure. He __________ got up. Please go and see for yourself.

That’s __ I can tell you.

Isn’t it hard to drive downtown to work?— Yes, that’s why I to work by train

Tom must be waiting for you now, _______?

Tired, Jim was fast asleep with his back_____a big tree