1. People will break the glass bottles into smaill pieces.

2. It is useful to learn English.

3. People built this house more than 100 years ago.

4. Na asked me if I went to school by bike.

5. Susan said her sister was coming to see her the following week.

6. Nga said if she was a teacher.

7. Do you mind if I sit here?

8. It's a rice-cooking contest.

9. I have taught Maths for 14 years.

10. I have not seen him for three days.