用所给词的适当形式填空。

1. September is the ________ (nine) month of the year.

2. Jack is the ________ (twenty) student in our class.

3. I ________ (like) the lecture because it's boring.

4. Please tell ________ (I) about ________ (you).

5. Two ________ (hour) work make the old man tired.

6. She has ________ (lot) of pen pals from different ________ (country).

7. How much are the ________ (piano)?

8. The ________ (run) look very young.