1.__________________ （直到失去健康） that people know the value of health.
    2.The bag was stuffed____________________( 臟衣服）
    3.___________________ （很多朋友不在）， we decided to put the meeting off.
    4._______________________ （給我印象最深的） were her liveliness and sense of humor.
    5.There engines are___________________ （不如我們制造的那些發(fā)動(dòng)機(jī)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