1.pick up 捡起

例句:We drove to the airport the next morning to pick up Susan.

我们第二天早晨开车去机场接苏姗。

2.add to 添加到

例句:The new film won't add to your credit.

这部新影片将不会增加你的声誉。

3.keep up with 紧跟;跟上

例句:Owing to his illness, peter couldn't keep up with the rest of the class and get badly behind.

由于生病，彼得没法跟上班级的其他同学，他落后一大截了。

4.pay off 付清

例句:It would take him the rest of his life to pay off that loan.

他得用余生来还清那笔贷款。