Câu bị động :

`-` Thì HTĐ : S + is / am / are + V3 / PII ( by O )

`-` Thì QKĐ : S + was / were + V3 / PII ( by O )

`2`.The boxes were mailed today

`3`.The two packages were opened by my sister

`4`.The room wasn't cleaned carefully yesterday

`5`.Our homework is corrected by our teachers

`6`.The newspaper is delivered to this office twice a day

`7`.The old man is respected by all villagers

`8`.Another bridge was built across the river last year

`9`.The rice was seperated from the husk

`10`.A fire was made by the boy's camp

`11`.This house was built more than one hundred years old

`12`.Every year million of tons of rice are experted by Viet Nam

`13`.Their Lunar New Year is celebrated by Vietnamese around January or February

`14`.The publisher's book was published in 1997

`15`.Our desk was repaired during the weekend

`16`.The fire was made in the traditional way

`\text{@ TheFox}`