听问题，选答句。（共 5小题，每小题2分）
（1）A. Yes, I do.
B. Yes, I am.
C. Yes, I can.
（2）A. It’s warm.
B. It’s hot.
C. It’s cool.
（3）A. He’s reading a book .
B. I’m writing an e-mail .
C. She’s writing a letter .
（4）A. Happy birthday to you.
B. Yes, thank you.    C. Thank you.
（5）A. It’s swimming .
B. It’s flying.
C. It’s climbing.