回上一层第五部 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
- figure out
- When did you figure out that he was the killer?
- We will never figure out the exact number for this problem.
- fill in
- Fill in the blank with your initials to confirm the agreement.
- fill out
- To apply for the credit card, fill out this form and send it to this address.
- fill up
- The mailbox was filled up with junk mail.
