Chuyển câu chủ động thành câu bị động :
1, Farmers cut rice during the harvest
2,We don't use this room every day
3, Jane doesn't do the homework very often
4, They didn't finish the project last month
5,Lan will clean the floor this Friday
6, You must finish your homework before nine o'clock
7, They are going to destroy that old house
8, I used to water the flowers when we lived in the countryside
9, People used to recycle paper in the traditional way
10, Nobody has used this machine for years
11, Mrs Bown is watering the flowers in the garden
12, We are discussing the pollution problem