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 生來時做……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.