I. Change the active into the passive
1. Did Sue knock that vase to the floor?
=>.....................
2. What time can the boys hand in their papers?
=>.....................
3. How long have they waited for the doctors?
=>.....................
4. Who looked after the children for you
=>.....................
5. Where do people speak English?
=>.....................
6. How did the police find the lost man?
=>.....................
7. They have given the women in most countries in the would the right to vote
=>.....................
8. People believe that 13 is an unlucky number
- It's believed.....................
- 13 is believed.......................
9. They know that English is an international language
- It's known that.....................
- English is known..........................
10. They say that John is the brightest student in class
=>.....................
11. Open your book.
-Let.......................................
12. Take off your hat
- Let......................................
Help me Help me!!! Em sắp thi rồi 
I. Change the active into the passive
1. Did Sue knock that vase to the floor?
=>...WAS THAT VASE KNOCKED TO THE.FLOOR?.................
2. What time can the boys hand in their papers?
=>....WHAT TIME CAN BE HANDED BY THE BOYS IN THEIR PAPERS?.................
3. How long have they waited for the doctors?
=>....HOW LONG HAVE THEY BEEN WAITED FOR THE DOCTORS?.................
4. Who looked after the children for you
=>.BY WHOM WERE THE CHILDREN LOOKED AFTER FOR YOU? ..................
5. Where do people speak English?
=>....WHERE ARE ENGLISH SPOKEN BY PEOPLE.................
6. How did the police find the lost man?
=>...HOW WERE THE LOST MAN FOUND.BY POLICE?.................
7. They have given the women in most countries in the would the right to vote
=>.....THE WOMEN IN MOST COUNTRIES IN THE WORLD HAVE BEEN GIVEN THE RIGHT TO VOTE................
8. People believe that 13 is an unlucky number
- It's believed.THAT ..13 is an unlucky number..................
- 13 is believed..TO BE AN UNLUCKY NUMBER.....................
9. They know that English is an international language
- It's known that...English is an international language..................
- English is known..TO BE an international language........................
10. They say that John is the brightest student in class
=>..IT IS SAID ...that John is the brightest student in class................
=>JOHN IS SAID TO BE the brightest student in class
11. Open your book.
-Let..BOOK IS OPENED.....................................
12. Take off your hat
- Let..HAT IS TAKEN OFF....................................