根据句意填空。

1. I can't pass the English exam. I f_________ very sad.

2. You must listen to the teacher _________ in class.

3. Listen! The old man is _________ what's happening to the house.

4. I can't find my key. It is _________.

5. There is snow all _________. Please clean it.

6. Fish can't live _________ water.

7. My father is _________ about my study. He is afraid I can't go to college.

8. Grandma Li is walking in the _________ park.

9. The children is having a _________ time on the playground now.

10. Mrs. Wang is _________ of cooking dinner.