8. It's about 2 kilometers from my home to school.(对画线部分提问) 

 is it from your home to school?

7. They have seen the film already.(改为否定句) 

They the film.

6. How about telling stories to cheer up the sick kids?(改为同义句) 

 tell stories to cheer up the sick kids?

5. Did you receive a letter from your pen friend last week?(改为同义句) 

Did you your pen friend last week?

4. Can you keep your promises?(改为同义句) 

Are you keep your promises?

3. We didn't climb the mountain because the weather was terrible.(改为同义句) 

We didn't climb the mountain the terrible weather.

2. Julie runs faster than Anna.(改为同义句) 

Anna doesn't run as Julie.

句型转换

1. His idea is different from mine.(改为同义句) 

His idea is not the mine.

30. 我认为这本书值得一读。

I think the book is .

29. 我感到很惊讶，我和大卫都未受邀参加这个晚会。

I felt surprised that David I was invited to take part in the evening party.