Unit 4同步练习及答案
（答题时间：45分钟）
I.单项选择
1. Li Fang’s backpack is heavier than .
A. I B. mine C. me D. my
2. The party was really a great .
A. success B. dream C. problem D. competition
3. Hainan is a province southern China.
A. to B. on C. at D. in
4. We can’t go with you because we are busy.
A. hardly B. still C. never D. till
