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。
