EX II:

1. When did you start your hobby?

2. We find making models is very interesting because we should creative

3. I think in the future, people will take up more outdoor activities.

4. My best friend doesn't like mountain climbing because he afraid heights.

5.  My sister enjoys cooking  and make new dishes by her own

EX III:

1. They type fast.

2. Peter works hard.

3. There aren't any bottles on the shelf.

4. We don't have time to prepare the speech.

EX IV:

1. As you look at the pages of a stamp album , you can learn  interesting details about foreign customs , arts , literature , history and culture.

2. Their colors can make you feel ralaxed and happy.

3. Collecting stamp can become a business.

4. If you are lucky in finding special stamps , it will bring you some money besides knowledge and pleasure.

@minhanhhadinh

học tốt =)))