以下是威廉希尔app 为你推荐的公共英语等级考试四级模拟练习（一）
1. Everyone is busy _____ the examination in the classroom.
A. with B. for C. on D. under
答案： A
解析： 注意几个固定搭配： be busy (in) doing sth 忙于做…; be busy with sth 忙于…; busy oneself (in) doing sth 忙于做……; busy oneself with sth 忙于……。
2. I suppose you couldn’t let me borrow your car this evening, _____?
A. couldn’t I B. don’t I
C. could you D. will you
答案：C
解析：suppose 后面的从句中为否定式couldn’t，而主句为肯定式，这是否定后移的用法，后面的反意疑问句要根据从句而定，故反意疑问句用肯定式could you。
3. Smoking is not good _____ you because it can affect your health.
A. for B. at C. to D. on
答案： A
解析： be good for… 对…有好处; be good at… 善长于…。
4. Henry and Bady _____ to the parties at the Trade union every Saturday.
A. are used to go B. use to go
C. used to go D. were used to go
答案： C
解析： be used to do… 被用于做…; used to do… 过去常常…。
5. _____ , the inhabitants fled.
A. The city taken B. The city having been taken
C. Having taken the city D. The city being taken
答案： B
解析： 独立主格结构。
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