用方框中所给词的适当形式填空。（5分）

1. Don’t let the kids ____ for a second.

2.Tom hopes to ____ with his old friends in America.

3.Mike was late for school ____ his illness yesterday.

4. You must ____ all the windows are closed before you leave the room.

5. We can ____ to help Mary with her lessons.

 Before you leave the classroom, please       the lights.

Don’t forget to         the lights before you leave the classroom.

A. turn on          B. turn off          C. turn up

Don’t forget to         the lights before you leave the classroom.
A. turn on          B. turn off          C. turn up