回上一層第七部 第四課 --- 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
- in vain
- Sylvia tried in vain to catch the butterfly on the flower.
- As a consequence of not going to classes, I was studying for the exam in vain.
- inside out
- Wayne mistakenly wore his socks inside out, which made all the students laugh.
- just about
- Teresa was just about done with cooking when the children came home.
- just in case
- I have more than enough cash in my wallet, just in case.
