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.