21.By no means ：绝不 /anything but

　　22.Check in/out

　　23.Come up：发生，出现，提出

　　24.Come up with：针对问题，挑战等提出，想出，赶上

　　I spent a whole week searching on the net， but came up with nothing valuable.

　　25.Concentrate on/focus on 集中

　　26.Deal with /cope with 处理

　　27.Drop in ：顺便拜访

　　28.Drop out of：不参与，退出

　　They’re likely to drop out of school and less likely to succeed in life.

　　29.Eat one’s words 食言

　　30.Fall short of：达不到，不符合

　　Its results fell short of her expectation.(2002-1)