以下每个习语都含有表示人体部位的词，但这些词却被赋予了新的含义，下面就请你细细品味吧。
1. Two heads are better than one. 三个臭皮匠，顶过一个诸葛亮。
2. hit the nail on the head 一针见血
3. an old head on young shoulders 少年老成
4. Walls have ears. 隔墙有耳。
5. smile from ear to ear 满面笑容
6． turn up one's nose 瞧不起
7. have one's hands full 应接不暇
8. None of your mouth! 住嘴！
9. make faces 做鬼脸
10. pull a long face 愁眉苦脸
11. arm in arm 亲密无间
12. neck and neck 并驾齐驱
13. put one's back into sth. 埋头苦干
14. back to front 前后倒置
15. take heart 鼓足勇气
16. break a leg 祝好运
17. Let's face it! 面对现实吧！
18. Blood is thicker than water. 血浓于水。