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） .
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