Ⅰ. 单项选择（10分）
1. English is widely used _______ travelers and business people all over the world.
A. to B. for C. as D. by
2. Our school is _______ bigger than _______.
A. much; you B. much; yours
C. more; you D. more; yours
3. Planting trees _______ protecting our environment.
A. are good for B. is good to
C. are good at D. is good for
