Câu bị động
1/ They cancelled all the flights because of the storm
=> All the flights were cancelled because of the storm.
2/ Someone will give you your tickets at the airport
=> You will be given your tickets at the airport.
3/ Someone is cleaning the classroom at the moment
=> The classroom is being cleaned at the moment.
4/ The working people has considered May Day as great holiday
=> May Day has been considered as great holiday by the working people.
5/ Since the 9th century, people have used wood for making the pulp
=> Since the 9th century, wood has been used for making the pulp.
Câu bị động
1/ They cancelled all the flights because of the storm
>All the flights were cancelled because of the fog
2/ Someone will give you your tickets at the airport
>You will be given your tickets at the airport
3/ Someone is cleaning the classroom at the moment
>the classroom is being cleaned at the moment
4/ The working people has considered May Day a great holiday
>May Day a great holiday has been considered
5/ Since the 9th century, people have used wood for making the pulp
>Since the 9th century, wood has been used for making the pulp