ĐÁP ÁN I. Change the following sentences into the passive. (Chuyển các câu sau sang bị động)

1 - Rice was grown in many countries in the world.

2 - The telephone was invented Graham Bell many years ago.

3 - This car has been used for many years.

4 - English is practiced by Lan every day.

5 - The garbage will be taken out of the city.

6 - I was sent this letter by Mary two days ago.

7 - Compost was made from vegetables

8 - This word must be finished before Sunday.

9 - This bicycle hasn't been used for a long time.

10 - A strange man was seen in my garden yesterday.

11 - The floor is cleant every morning.

12 - The problem will be solved soon.

13 - The glass was broken into small pieces.

15 - These cars were made in the USA.

16 - The Internet has been used all over the world.

17 - Many trees were planted in the school garden.

18 - My book has been taken away.

19 - I wasn't helped with my homework.

20 - English has been learnt for three years.

21 - Books are often read by my father before bedtime.

22 - Some comic books were bought for her brother by Lan.

23 - A letter was received yesterday.

24 - The problem can be solved in just 2 minutes.

25 - Electricity was used for lightning nowadays.