问题

Not until some students failed in the exam _____ how much time they had wasted.

A:didn’t they realize
B:did they realize
C:they didn’t realize
D:they realize

正确答案是：

同类题型

MrSmith was very ill.The doctors said he was ___ of death

下列文学常识表述有误的一项是（）

What do you think of the film —Cool! Never before _____ a better one.

Does the film _____ you?—Yes. I’ve been hooked deeply.

Ben and Sue aren’t home, are they—No.They _____to London on business.