回上一层第12部 第八课 --- 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
- watch out for
- When riding buses in this city, you should always watch out for pickpockets.
- watch over
- Would you please watch over my seat?
- wear down
- I think the motor is wearing down quicker than before.
- wear off
- The perfume wears off too soon to be useful.
- Painful memories wear off over time.
