I、 单项选择 （每题1分，共15分）
1、You must stop _______. My father is sleeping.
A. talk B. talking C. to talk
2、As we know, water is very important _______ us.
A. of B. with C. to
3、—_______ do you think of the story? —Just so-so.
A. What B. why C. Which
4、Anhui is famous ____ Mount Huang. Many visitors all o ver the world come to visit it.
A．to B. for C. of
