根据中文提示或用所给词的适当形式填空。

1. There are _____ (十四) classes in our grade.

2. He is tall and _____ (强壮的)while his sister is small.

3. Peter, where can we buy some _____ (礼物) for our teachers?

4. October is my _____ (特别喜爱的) month.

5. It's important to look at the _____ (黑板) and listen to our teacher carefully.

6. Our classroom is big and clean, but _____ (they) is very dirty.

7. Lily and Lucy are twin _____ (sister).

8. When I have time, I always go _____ (shop) with my good friends.

9. It's Simon's _____ (one) day at Beijing Sunshine Secondary School.

10. Daniel's mother is a worker and his father is a _____ (drive).