17: The nurse taught Hoa how to give first-aid on the phone.
-> Hoa was taught how to give first-aid on thephone by the nurse.
18: When I came,he was repairing the computer.
-> When I came,the computer was being repaired by him.
19: We will grow a lof of trees in the parks.
-> A lot of trees will be grown in the park by us.
20: They are painting the living room light blue.
-> The living room are being painted light blue by them.
21:
People have developed many different paper products.
Many different paper products have been developed.
17.The nurse taught Hoa how to give fist-aid on the phone.
-Hoa was taught how to give fist-aid on the phone by the nurse
18.When I came, he was repairing the computer
-When I came,the computer was being repaired by him
19.We will grow a lot of trees in the parks.
-a lot of trees will be grown in the parks by us
20.They are painting the living room light blue.
-the living room light is being painted blue
21.People have developed many different paper products.
-many different paper products have been developed
17.The nurse taught Hoa how to give fist-aid on the phone.
-> Hoa was taught how to give first-aid on the phone by the nurse.
18.When I came, he was repairing the computer
-> When I came, the computer was being repaired.
19.We will grow a lot of trees in the parks.
-> A lot of trees will be grown in the parks.
20.They are painting the living room light blue.
-> The living room is being painted light blue.
21.People have developed many different paper products.
-> Many different paper products have been developed.
