根据句意用括号内所给词的适当形式填空。

1. Thank you for _____ (organize) the class trip.

2. This is the _____ (child) playhouse.

3. His brother _____ (study) English very hard.

4. —Whose is this sweater?    —It's _____ (he).

5. —What do you use to brush your _____ (tooth)?  

    —Toothbrush.

6. —Who _____ (cook) the meals in our home?

    —My mother does. She is a very good cook.

7. —When is _____ (teacher) Day? 

    —On September 10th.

8. We are really _____ (excite) at the exciting news.

9. He is _____ (dress) up as a ghost.

10. Do you have _____ (some) books about Halloween?