1.They made cheese from milk. * 10 điểm A.Cheese was made from milk. B.Cheese was make from milk. C.Cheese were made from milk.

2.Student swept classrroom last weekend. * 10 điểm A.Classroom was sweep last weekend by student. B.Classroom is swept last weekend by student. C.Classroom was swept last weekend by student.

A.Many little trees were grow in the garden by Mr Minh. B.Many little trees was grown in the garden by Mr Minh. C.Many little trees were grown in the garden by Mr Minh.

A.Bad weather are caused by many accidents. B.Bad weather was caused by many accidents. C.Bad weather were caused by many accidents.

note was written on the board by Mai. B.A note wrote on the board by Mai. C.A note was wrote on the board by Mai.

1. A.Cheese was made from milk. => cheese => số ít nên dùng was , bị dộng thì quá khứ đơn: S+ was/were+ VpII (by O)

2.D. Classroom was swept last weekend by student.

=> classroom là danh từ số ít nên dùng was , sweep sang thì quá khứ là swept , bị động thì qua khứ đơn: S+  was/ were+VpII (by O)

3.Many little trees were grown in the garden by Mr Minh.

= many trees là danh từ số nhiều nên dùng were , bị động thì quá khứ  đơn :s + was / were + VpII (by O)

4.Bad weather was caused by many accidents.

=> bad weather là danh từ số ít không đếm được nên dùng was

=> bị động thì qua khứ đơn: S+  was / were + VpII (by O)

5.A note was written on the board by Mai.

=> bị động thì qua khứ đơn: S+  was / were + VpII (by O)