句型转换。
1. There are some girls in the playground. (变为一般疑问句，并作肯定回答)
______ ______ ______ girls in the playground?
______, ______ ______.
2. There are forty-six students in the playground. (对划线部分提问)
______ ______ students are there in the playground?
3. There are some trees on the hill. (变为否定句)
______ ______ ______ trees on the hill.
4. The office is in front of the classroom. (写出意思相反的句子)
The office is ______ the classroom.
5. on, are, and, three, books, there, a, pen, the, desk(. ) (连词成句)
_________________________________________