单句改错。

1. They are college students come from Xiamen College. __________

2. During their summer holiday they had an excited experience. ___________

3. The children stood at the doorway watched the guests coming in. ___________

4. His approach for the problem is special and proves good. __________

5. I don't know his address, nor I care. _________

6. Who is possible to come to our party this evening? _________

7. She now often listens to the recorder to improve her speaking English. _________

8. In order to avoid to make mistakes in his composition, he often refers to a dictionary. _________

9. The boy was late and he came to run to the school. _________

10. We were all nervous about the approached examinations. _________