回上一層第二部 第一課 --- 請重複跟讀，直到可以於聲音檔的留空之間唸完整句為止；熟練之後您必將可以 "脫口而出" 地說出標準的美式英語
- at least
- You should read at least one book a month.
- I am poor, but at least I follow the law!
- at once
- Einstein wanted to start working at once.
- How can you do so many things at once?
- at one time
- Ian was at one time so devoted to playing the piano.
- Jeffrey dribbled three balls at one time.
- at present
- At present, I still don't want to retire.
