1. Look! The sun is setting behind the mountains
2. I have been waiting for her for half an hour but she hasn’t come.
3. If I were him , I would choose English to learn.
4. In the end, I decided not to buy that dictionary because it was too expensive.
5. This video film is so interesting that I have seen it twice.
7. I would tell him the truth if I were you.
8. My father used to smoke when he was young.
9. Hoa has more books than her sister.