11 不要破坏现状、捣乱
12 Worth its weight in gold
12 很有价值的
13 Speak for the devil.
13 说曹操曹操到
14 Right up/down someone's alley.
14 某人的专长
15 You never know what you can do until you try.
15 你不试试看，就不知道自己的潜力。
16 You scratch my back, and I'll scratch yours.
16 你帮我，我也帮你
17 A penny saved is a penny earned.
17 省一分就是赚一分
18 Get away from it all
18 远离这一切
19 Make a mountain out of a molehill
19 大惊小怪；小题大做；言过其实
20 Two heads are better than one.
20 三个臭皮匠抵过一个诸葛亮