回上一层第叁部 第七课 --- 请重复跟读，直到可以於声音档的留空之间唸完整句為止；熟练之后您必将可以 "脱口而出" 地说出标準的美式英语
- cash out
- In times of economic down turn, many people cashed out their properties before land values plummet even more.
- catch cold
- It is easy to catch cold in autumn.
- catch fire
- Don't be silly; the wet wood is hard to catch fire.
- catch on
- I didn't catch on to Erica's jokes.
- This style of hat caught on last year.
