1. Unless he works harder, he will lose his job.
2. It is the first time I have been here.
3. I haven't seen Nam for 3 years.
4. Carol told Peter not to make so much noise.
5. Mrs Hoa suggested that I should turn off the lights before going out.
6. Mr.Brown asked me what my name was.
7. The last time I met her was three years ago.
8. Tam 's friend asked him how long he would stay in England.
9. My homework has already been done by me.
10. If you do practise speaking English every day, you can improve your English.