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.

$_Minh_$

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 sweept by the students everyday

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 before

12 . The boy have 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 school yard clean

17 . I was delighted to get the best result in the final exam