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)

    _________________________________________