句型转换。
1. There is a tree in front of the classroom. (改为一般疑问句并作否定回答)
______ ______ a tree in front of the classroom?
No, ______ ______.
2. There are some offices in the hospital. (改为否定句)
______ ______ ______ offices in the hospital.
3. There are twenty computers in the room. (对划线部分提问)
______ ______ computers are there in the room?
4. The TV is in my room. (对划线部分提问)
______ ______ the TV?
5. The science lab is behind the library. (改为同意句)
The library is ______ ______ ______ the science lab.
