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.
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
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.
50, fall back on 依赖
A: Were you able to understand that French novel without any help from theteacher?
B: I did pretty well, but I had to fall back on my dictionary occasionally.