回上一层第十部 第二课 --- 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
- sell out
- I bet the concert will sell out in two days.
- Tickets for the movie at 9 had already sold out.
- send for
- Somebody please send for a doctor; we have an injured person here.
- send in
- I am positive that the application had been sent in.
- send off
- Renee sent him off in high spirits.
- I need the package sent off today.
