一．单项选择。（共20分，每小题1分）
( )1. Eating healthy food is good ______ your health.
A. for B. with C. at D. about
( ) 2. --_______ did you go on vacation, Jack? -- I went to Qingdao.
A. What B. Where C. When D. How
( )3. --_______ do you watch TV ?--Once a week.
A. How long B. How much C. How often D. when
( ) 4. _______he is very young , _________he can do many things .
A.Though; but B.Though;/ C./; Though D.but ;Though
