Read and choose. (读句子,选择正确的答语) ( )1. Is this a library? ( )2. Your school is so cool! ( )3. How many students are there in your class? ( )4. Do you have a canteen? ( )5. Where is the teacher's office? A. Yes, we do. B. It's on the third floor. C. Thank you. D. Yes, it is. E. Twenty-nine.