Ex1:Change sentences into passive voice.
1.My mother cleans the floor every day.
->........................................
2.People have used the Internet all over the world.
->........................................
3.We are planting many trees in school garden.
->........................................
4.Some one has taken my book away.
->
5.He didn’t help me with my home work.
->.........................................
Ex2:Change sentences intoactive voice.
1.Many flowers are watered by my father every day.
->
2.English has been learned by us for 3 years.
->
3.This car was made from Japan ten years ago.
->
4.Our teeth should be cleaned every day.
->
5.This building was built two years ago.
->
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Sinh Học lớp 12
