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 閉嘴

I told you to cut it out。

43. be cut out for 生來(lái)時(shí)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…。。湊合； do without 沒有……也行

You can do with your girlfriend。

You can do without your girlfriend

47. dog tired 特別累

同義：run down; worn out; out of steam

I’m dog tired these days. I’m working on seven articles。

48. down jacket 羽絨服

49. drive somebody up the wall 讓某人發(fā)瘋

同義：drive somebody out of one’s mind

The sound of all that raffic is driving me out of my mind。

50. fall back on 依賴

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。?