giúp mk vs ạ
36. It is necessary for you to do your homework every day.
You have ……………………………………….
37. Nam is only seventeen years old. He can’t drive a car.
Nam isn’t ………………………………………
38. The river is not clean enough for us to swim in.
The river is ……………………………………………
39. I had a dog last year but I don’t have any more now.
I used to ……………………………………………………..
40.Putting a knife into an electrical socket is very dangerous.
It’s…………………………………………………..
41. John smokes a lot a year ago, but now he doesn’t smoke any more
→ John used ……………………………………………………………………………………………………………………………
42. It’s time for you to go to school
→ It’s time you ……………………………………………………………………………………………………………………………