一．单项选择。(每小题1分，共20分)
( ) 1. — How old are you? — ________________.
A. I’m fine B. I’m 13 C. I’m Lily
( ) 2. — Can you play football? — Yes, ___________.
A. I can’t B. I am C. I can
( ) 3. This is _______ school.
A. our B. we C. I
( ) 4. — _________ is your sister? — She is a teacher.
A. What B. How C. Which
