听问句，选答语。 (     )1. A. This is my teacher. B. Yes, he is. C. Hello, teacher. (     )2. A. I visited my grandma last Tuesday. B. I am going to play football. C. I do the dishes every day. (     )3. A. It's October lst. B. Happy National Day. C. It's in 1949. (     )4. A. What about you？ B. No, I don't. It's salty. C. Let's have some beef. (     )5. A. He is collecting leaves. B. He usually goes to school by taxi. C. He likes playing the piano.