1.__________________ (直到失去健康) that people know the value of health.
2. The bag was stuffed____________________( 脏衣服)
3.___________________ (很多朋友不在)， we decided to put the meeting off.
4._______________________ (给我印象最深的) were her liveliness and sense of humor.
5. There engines are___________________ (不如我们制造的那些发动机功率大) .
参考答案：
1. It is not until they lose it
2. with dirty clothes
3. With many friends absent
4. What impressed me the most
5. less powerful than the ones we have made
