7、If you fall, dust it off. Don't let up.
11、We will not stop or let up till Tunis has been captured.
15、On the afternoon of the 2nd of the 3rd lunar month, the rain that had been going on for days let up.
1、We mustn't let up now.
5、The traffic will let up in a few minutes .
10、The snow that had let up during the afternoon was falling again.
16、Acetaldehyde eventually turns into something called acetate, and when that happens, your symptoms let up and you start to feel much better.
3、"Don't let up, Bobby," his father shouts.
9、It's unwise to let up your students just before the examination.
17、When she fights strong and the tiller slips a little, in a jerky, greasy sort of way, let up on her a trifle;
6、Isn't it about time you let up on me?
14、We nust plod away at our task no matter how difficult it is; we mustn't let up on it.
8、I know if she doesn't let up soon, I'm going to blow up at her.
2、The pain finally let up.
18、George pitched a ball that was very fast and the batter missed he let up on the next pitch and the batter was badly fooled.
4、We mustn' t let up, even though we' re winning.
13、The rain will let up soon and we can start out.
12、The storm never let up, continuing to swallow everything with smothering force.