成语
1. 一举两得 : kill two birds with one stone
2. 鸦雀无声 (yā què wú shēng): as silent as the grave
3. 下不为例(lì) : not to be taken as a precedent
4. 心不在焉 (yān): absent-minded
5. 聚精会神 (jù jīng huì shén): concentrate one's attention on
6. 七上八下 :an unsettled state of mind
7. 丢三落四 (diū sān là sì): miss this and that
8. 出尔反尔 (chū ěr fǎn ěr): back and fill, contradict oneself
9. 窃窃私语(qiè qiè sī yǔ): whisperig