听句子, 从所给的A 、B 、C 三个选项中选出一个最佳应答。
1. Shall we go diving in Cuba?
A. You are so lucky.
B. Good idea!
C. No, I couldn’t.
2. Are you ready, Betty?
A. Cheer up!
B. OK, let's go!
C. I want to sleep.
3. Have you helped me feed my fish?
A. Yes, I did.
B. Not too bad.
C. No, I haven't yet.
4. How was last night's concert, Joy?
A. Wonderful!
B. I'd like to.
C. I'm afraid I can’t.
5. How many times have they appeared on TV?
A. Once a week.
B. Three times.
C. Four days ago.