9. This house was built more than one hundred years ago.
10. The tourist asked Lan if Phong Nha was in Quang Binh province.
11. It is a rice-cooking contest.
12. The tourist said that they liked that place.
13. Tam did the last exam so good that her parents were very pleased.
14. It is important that we reduce the amount of garbage we produce.
15. Nam is going to Ba's house because they are doing a group project.
16. Since I was sick, I didn't go to class last Monday.