1. Rice was grown in many part of the world.

S + was/were + V3/ed + (by+O): câu bị động thì QKĐ 

2. Books are often read by my father before bedtime.

S + is/am/are + V3/ed +(by+O): câu bị động thì HTĐ

3. Milk is used for making butter and cheese.

4. Trees will be planted after Tet.

S + will + be + V3/ed +(by+O): câu bị động thì TLĐ

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1. Some comic books were bought for her brother by Lan.

2. He was seen last month.

Bạn học tốt :3

#_quynhly_

1. Rice is grown in many part of the world.

2. Books is often read before bedtime by my father.

3. Milk is used for making butter and cheese.

4. Trees will be planted after Tet.

1. Some comic books was bought for Lan's brother by her.

2. He was seen  last month.