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C.

I.

1. Mr. Hai eats dinner very close to the bedtime so he usually has stomach problems.

2. My dad has a lot of carved eggs but he has never sold any of them.

3. Clean your bed room more regularly or you will get a breathing problem.

4. Volunteer is special to many people because they can help others.

5. Although he tried hard, he couldn't set up a new world record.

6. They went for a picnic and we went grass sliding.

7. The TV set did not work properly so I turned it off. 

8. Volunteer work is very hard for teenagers in the city but they enjoy doing it. 

9. Either he or his brothers don't like reading books.

10. I am interested in playing table tennis and so is my sister.

II.

1.boring/bored

2.interested/interested

3.excited/exciting

4.tiring/tired

IV.

1.I was strongly impressed by the film.

2.My younger sister is terrified of horror films. 

3.I am surprised at his new film. 

4.I was excited about the film.

5.The film was boring so we left halfway through it.