1. Bicycles must not be left in the hall.
2. The poem was written by Clement Clarke Moore in 1824
3 . I was introduced to Dr. Felix by Mr. Pike last year.
4 . My bike is going to be repaired by my father tonight.
5 . English is spoken by many people in the world.
6 . The bill must be paid before the first of the month.
7 . The classroom is swept by the students every day.
8 . You will be asked several questions by the police tomorrow.
9 . The telephone was invented by Bell a long time ago.
10 . Their house has been decorated recently.
11. This man has never been met by Daisy before.
12. The boy has to be shown the easiest way to do it.
13. It's impossible to work in those conditions.
14. It's very difficult to follow your direction.
15. It's interesting to travel around Vietnam.
16. It's necessary to keep the schoolyard clean.
17. I was delighted to get the best result in the final exam.
