这道题的翻译谢谢

1. To my surprise, John can say excellent Chinese.

2. Students keep questioning to foreign teachers.

3. Allen regard Linda as her best friend.

4. This math problem is so difficult so that not many students can work out.

5. Bill konws nothing about Chinese culture.

6. This issue has no practical significance.
   

To my surprise, John's Chinese is so good.
The students keep asking the foreign teacher questions.
Ellen regards Linda as her best friend.
Since the math question is too difficult, only a few of the students can work it out.
Bill knows nothing about Chinese culture.
The problem has no practical significance.