句型转换。

1.There are a lot of sheep on the hill. (改为否定句)

   There ________  ________sheep on the hill.

2. There is a lot of chocolate in the box.(改为否定句)

    There ________ ________ chocolate in the box.

3. She studies for three years in America. (对划线部分提问)

    ________  ________ ________ she ________ in America?

4. This book isn't the same as that one. (改为同义句)

    This book ________ ________ ________that one.

    There are some________ between this book and that one.