Liaten and choose．根据答语，选择合适的问句。
（ ）1. A. What are you doing?
B. What did you do?
C. What will you do tomorrow?
（ ）2. A. How many gifts do you need?
B. How much is the apple?
C. How often do you buy gifts?
（ ）3. A. Who will you invite to the house?
B. When do they leave your house?
C. Where is your house?
（ ）4. A. Do you like flags?
B. What would you like to buy?
C. Did you like flags?
（ ）5. A. Did you buy a camera?
B. What do you buy?
C. What did you buy yesterday?
