句型转换。

1. There are some offices in our school. (改为否定句)

    There ______ ______ offices in our school.

2. There is a bike in front of the car. (改为一般疑问句, 并作肯定回答)

    ______ ______ a bike in front of the car?

    Yes, ______ ______ .

3. There are some dictionaries on the desk. ( 对划线部分提问)

    ______ ______ dictionaries ______ ______ on the desk?