回上一层第四部 第一课 --- 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
- come about
- Marcus canceled the trip because of what came about last week.
- come across
- I came across Kirsten at the mall today.
- When did you come across that treasure?
- count off
- Let me count off the coins for you.
- count on
- You can always count on Natalie's promise.
- I would count on this product becoming a bestseller.
