7. They have been waiting for many hours to see the singer, but the airplane must have been _____.
A. behind the times B. behind schedule
C. ahead of time D. in no time
[答案]B. behind schedule.
[注释]behind schedule(=late, behind time)晚点：The train is running behind schedule today.(=The train is not on time today.)behind the times(=using things not in style; still following old ways; old fashioned)过时，跟不上时代，落后：1)The store is behind the times.(=The store is old-fashioned; it looks as stores looked 40 years ago.) 2) Mary thinks her parents are behind the times because they still do the fox-trot and don't know any new dances.(=Mary's parents are old-fashioned in their dancings .) ahead of time提前： They have fulfilled their production plans ahead of time, in no time(=soon, quickly)立即，马上：I'll be back in no time to see you home.
8. Neither of them thought highly of him and they both tried to _____ him in his work.
A. hamper B. support C. assist D. encourage
[注释]hamper(=hinder, prevent free movement or activity)阻碍：Lack of equipment is hampering our work.
Think highly of... 对...评价很高，认为......很好。
9. Her display of bad temper completely _____ the party.
A. harmed B. damaged C. spoilt D. hurt
[注释]spoil指出意指“使...... 扫兴，搞糟”，如：Quarrelling spoilt the picnic.(争吵使这次野餐弄得很扫兴。)hurt伤害，damage 损坏，harm危害，均不合题意。