问题

The volunteers kept their hands in hot water __________ they could no longer tolerate the pain.

A:unless
B:until
C:when
D:after;

正确答案是：

同类题型

Don’t give up and _______learning. I’m sure you will succeed one day.

You’d better keep quiet in class.— Sometimes I______ . Yesterday, I was as quiet as a mouse during my English class.

Nina, you look much than when I saw you last year.

What’s your sister doing at the moment

We didn’t plan to meetWe met ________ in the street