$1.$ Our cars are washed by us every week.
- S + is/ are + V (Pii) + (by O).
$2.$ "Romeo and Juliet" was written by Shakespeare.
- S + was/ were + V (Pii) + (by O).
- "Romeo and Juliet" là tên của một câu chuyện chứ không phải là chủ ngữ số nhiều chỉ hai người tên Romeo và Juliet nên ta dùng "was".
$3.$ The telephone was invented by Alexander Graham Bell.
- S + was/ were + V (Pii) + (by O).
$4.$ Cola is drunk by millions of people around the world.
- S + is/ are + V (Pii) + (by O).
$5.$ Jose was invited to a party last week.
- S + was/ were + V (Pii) + (by O).
$6.$ The post is delivered every day.
- S + is/ are + V (Pii) + (by O).
$7.$ This book was given to me as a gift.
- S + was/ were + V (Pii) + (by O).
$8.$ Coffee is made from coffee beans.
- S + is/ are + V (Pii) + (by O).
$9.$ This school has been built.
- S + have/ has + been + V (Pii) + (by O).
$10.$ The missing painting will be found.
- S + will + be + V (Pii) + (by O).