3.Come up:發(fā)生，出現(xiàn)，提出　　4.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.　　5.Concentrate on/focus on 集中　　6.Deal with /cope with 處理　　7.Drop in :　　8.Drop out of:不參與，退出　　They re likely to drop out of school and less likely to succeed in life.　　9.Eat one s words 食言　　10.Fall short of:達(dá)不到，不符合　　Its results fell short of her expectation.