70. letter of recommendation 推薦信
I think I deserve a letter of recommendation.

71. look on the bright sides of things 看事物的光明面
Don't be worried, you should always look on the bright side of things.

72. no kidding 不是開玩笑吧
No kidding! He was only getting at you.

73. on the tip of one's tongue 就在舌尖
A: Are you sure you can’t remember the name of that record?
B: It’s just on the tip of my tongue!

74. quitting time 下課時間
I’m glad it’s almost quitting time.

75. take it over 重修
Don failed physics and had to take it over.

76. than necessary 比應(yīng)該的要冷
The lab was cooler than necessary.

77. That’s easer said than done. 說來容易做來難
We talk about reducing our costs, but it's easier said than done.

78. There is nothing to it. 沒什么，很容易
I can run this projector. There’s really nothing to it.

79. with flying colors 成功
A: How did Ellen do on her American History exam?
B: She passed with flying colors.

80. You can bet your life 當(dāng)然
A: Will Prof. Smith come to class on time?
B: You can bet your life.

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