It’s about time we clear off the desk.
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??38,come down (雨，雪)下起来
??The heavy rain is coming down, now.
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??39, come in first in the race 比赛第一名
??Not only did Jill come in first in the race but she also had her best running time of the season.
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??40,come what may 不管怎样
??We’ll pick you up tomorrow at eight, come what may.
??
??41,cost somebody an arm and a leg
??A: Did you see the diamond ring Bill gave to Linda?
??B: I sure did. It must have cost him an arm and a leg.
??
??42, cut it out 闭嘴
??I told you to cut it out.
??
??43,be cut out for 生来时做……的
??Dr. Hamilton doesn’t feel Larry is cut out for the medical profession.
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??44,department chair 系主任
??I didn’t write that memo to the department chair.
??
??45,dirt cheap 非常便宜
??A: You’ve already furnished your apartment?
??B: I’ve found some used furniture that was dirt cheap.
??
??46, do with 用…..凑合; do without 没有……也行
??You can do with your girlfriend.
??You can do without your girlfriend
??
??47, dog tired 特别累，同义：run down; worn out; out of steam
??I’m dog tired these days. I’m working on seven articles.
??
??48, down jacket 羽绒服
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??49，drive somebody up the wall 让某人发疯；同义：drive somebody out of one’s mind
??The sound of all that raffic is driving me out of my mind.
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??50, fall back on 依赖
??A: Were you able to understand that French novel without any help from the teacher?
??B: I did pretty well, but I had to fall back on my dictionary occasionally.