回上一层第七部 第五课 --- 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
- just now
- Vivian called just now to remind you of the meeting.
- keep an eye on
- Will you keep an eye on my house while I am out of the country?
- keep in mind
- Keep in mind that the supermarket closes at 7pm.
- keep in touch (with)
- I kept in touch with my classmates for many years after graduation.
