Vai trò và ý nghĩa của trường THCS:
- Đối với nhân dân trong xã, huyện.
- Đối với nhân dân của tỉnh, nhân dân cả nước.

19.He hates people staring at him.- He hates being ………………………………………….

20.Someone will tell her which bus to catch.- She ………………………………………………………….

21.Thieves broke into the house.- The house ………………………………………………………..

22.His mother did not take care of him.- He ……………………………………………………………….

23.They will inform you the result of the exam  by letter.- You ……………………………………………….

- The result …………………………………………………….

24.When will they open the shop?- When …………………………………………………………

25.They will serve fish to the guests about ten minutes from now.- Fish …………………………………….

26.They have sold thousands of CD machines since 1980.- Thousands ……………………………………..

27.That company will publish a textbook next year.- A textbook ……………………………………………….

28.My friends told me to change the way.- I ………………………………………………………….

29.Shakespeare wrote many famous plays.- Many famous  plays ……………………………………….

30.Bill will invite Ann  to the party.- Ann …………………………………………………………

31.Alex is preparing that report.- That report ……………………………………………………

32.The teacher is going to explain the lesson.- The lesson ……………………………………………………….

33.Kathy had returned the book to the library.- The book ……………………………………………………….

34.Does professor Jackson teach that course?- Is the course ………………………………………………?

35.Is Mrs. Brown painting your house?- Is your house ……………………………………………………….?

36.Doctor Ikeda developed that theory.- That theory …………………………………………………………..

37.A storm destroyed the small fishing village.- The small …………………………………………….

38.Hundreds of people visit the Washington Monument each day.

- The Washington Monument …………………………………………

39.The Chinese invented paper, the main writing material today.

- Paper, ………………………………………………………………..

40.Jim’s daughter drew that picture.- That picture …………………………………………………………

II.Change the active into the passive.

1.Somebody cleans the room everyday.- The room ……………………………………………….

2.They cancelled all the flights because of fog.- All the flights ………………………………………………..

3.People do not use this road very often.- This road ……………………………

4.How do people learn languages?- How …………………………………….

5.People advised us not to go out alone.- We ………………………………………………

6.They are going to build a supermarket next year.- A supermarket ………………………………………….

7.She is using the computer at the moment.- The computer ………………………………………………

8.They are opening a new ring road round the city.- A new ring road ……………………………………..

9.They have built a big hospital which costs much money.  - A big hospital …………………………………..

The girl did not give me the money  .- I ……………………………………………………..

  - The money ……………………………………….

10.A man asked me several difficult questions at the interview.  - I ………………………..

11.Nobody told me the story.  - I …………………………………………….- The story ……………………….

12.About 30 million people are watching this program.- This program ………………………………

13.They are building some new houses down the street.

- Some new houses ……………………………………………….

14.They have moved nothing in your room. - Nothing ……………………………………………….

15.People used oil-lamps years ago.- Oil-lamps ……………………………………………….

16.When did they open that hospital?- When …………………………………………

17.The atmosphere protects the earth from harmful radiation from the sun.

- The earth …………………………………………………..

18.Did anyone see you come in?- Were you ………………………………………………………?

19.He hates people staring at him.- He hates being ………………………………………….

20.Someone will tell her which bus to catch.- She ………………………………………………………….

21.Thieves broke into the house.- The house ………………………………………………………..

22.His mother did not take care of him.- He ……………………………………………………………….

23.They will inform you the result of the exam  by letter.- You ……………………………………………….

- The result …………………………………………………….

24.When will they open the shop?- When …………………………………………………………

25.They will serve fish to the guests about ten minutes from now.- Fish …………………………………….

26.They have sold thousands of CD machines since 1980.- Thousands ……………………………………..

27.That company will publish a textbook next year.- A textbook ……………………………………………….

28.My friends told me to change the way.- I ………………………………………………………….

29.Shakespeare wrote many famous plays.- Many famous  plays ……………………………………….

30.Bill will invite Ann  to the party.- Ann …………………………………………………………

31.Alex is preparing that report.- That report ……………………………………………………

32.The teacher is going to explain the lesson.- The lesson ……………………………………………………….

33.Kathy had returned the book to the library.- The book ……………………………………………………….

34.Does professor Jackson teach that course?- Is the course ………………………………………………?

35.Is Mrs. Brown painting your house?- Is your house ……………………………………………………….?

36.Doctor Ikeda developed that theory.- That theory …………………………………………………………..

37.A storm destroyed the small fishing village.- The small …………………………………………….

38.Hundreds of people visit the Washington Monument each day.

- The Washington Monument …………………………………………

39.The Chinese invented paper, the main writing material today.

- Paper, ………………………………………………………………..

40.Jim’s daughter drew that picture.- That picture …………………………………………………………

Oxi hóa hoàn toàn 2,4 gam Magie.
a) Tính thể tích oxi phản ứng ( ĐKTC ).
b) Tính thể tích không khí ( ĐKTC ).