用所给词的适当形式填空。
1. The boys in my class are ______(cautious) not to make any mistakes in spelling than ever before.
2. I am ________(negative) that you took down my number incorrectly.
3. He has a real ________(enthusiastic) for teaching.
4. She noticed a sudden _______(move) behind the tree.
5. They discussed the situation _________(private) .
6. Scientists disagree about how the universe________(creative).
7. Such problems are a______(universe) feature of all ages.
8. I suddenly lost my balance and fell _______(forward) .
