1. Would you mind closing the door?
2. They didn't let us smoke in here
3. My teacher advised us to buy that book.
4. He began studying English six years ago.
5. Mastering English is necessary.
6. It took him two hours to write the essay
7. He is looking forward to hearing from her as soon as possible
8. Do you mind helping me to put the chairs away.
9. Please remember to do this homework.
10. Please stop asking so many questions.
11. Let's stop discussing phrasal verbs now.
12. They stopped playing chess a long time ago.
13. he stopped smoking 3 years ago
