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