6. Smoking is not allowed in this restaurant.
7. The trophy was presented to the winner by the president.
8. It’s over 20 years since he last went back to his village.
9. We haven’t seen our grandfather for two years.
10. The soil hereis said to be very rich.
11. We have not seen our grandfather for five months.
12. The date of the meeting will be changed again.
13. Safety helmets have to be worn at all times.
14. I have not spoken to her for two years.
15. By whom was this story written ?