16. When the students were playing games, the teacher arrived.

17. The children are looking forward to traveling to the countryside.

18. Bill asked me if I wantes to buy any second hand books.

19. SHe asked me where I came from.

20. It is difficult to learn English.

8. Nobody had been expecting the storm which caused a lot of damage.

9.We used to go to school in the morning last year.

10.Hoa wishes she had a new bicycle.

11. I don't think this program is suitable to the children

12.She has just received the letter from her farther.

13.I used to wear jeans when I was young.

14.Liz wishes her parents were in Hanoi with her now.

15.If I were rich, I would travel around the world.

1. He is said that he likes the children.

2.I haven't seen him for 5 years.

3.She cleans the floor everyday.

4. Remember to turn off the fan when you leave the classroom.

5.He doesn't like people laughing at him.

6. If you run out of money, I will lend you $20.

7. A large number of people were killed when a huge earthquake struck the city

a, B. majority

b, C. stay

Quặng manhetit được dùng để điều chế kim loại nào

A. Chì 

B. sắt

C. nhôm 

D. đồng