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.
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