背大学英语四级词汇

　　3.Come up:发生，出现，提出 　　4.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. 　　5.Concentrate on/focus on 集中 　　6.Deal with /cope with 处理 　　7.Drop in : 　　8.Drop out of:不参与，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:达不到，不符合 　　Its results fell short of her expectation.