24.Come up with:針對(duì)問(wèn)題，挑戰(zhàn)等提出，想出，趕上

　　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 處理

　　27.Drop in :順便拜訪

　　28.Drop out of:不參與，退出

　　Theyre likely to drop out of school and less likely to succeed in life.

　　29.Eat ones words 食言

　　30.Fall short of:達(dá)不到，不符合

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