一、 单项选择题（15分）
( )1. ________do you surf the Internet? Once a week.
A．How B．How old C．How often D．How many
( )2. His mother wants him ________ good food.
A．eat B．to eat C．eating D．eats
( )3. What's the matter ____________ you?
A. for B. with C. to D. at
( )4. I have a toothache. I should ____________.
A. see the dentist B. drink more water
C. lie down and rest D. eat lots of candies
( )5. It's important _____________ a balanced diet.
A. to eat B. eating C. to eating D. eat
