It is estimated that about 200 million people who use the Internet computer network around the world. The Internet allows people _____ (27) at home instead of traveling to work. The Internet allows businesses to communicate with customers and workers in any part of ____ (28) world  for the cost of  a local telephone call. E.mail allows____ (29) to send documents, pictures and other data from one part of the world to another in at least 5 minutes. People can use the Internet to do shopping. ____ (30) saves a lot of time. It is possible to use the Internet for _____ (31) – students may connect with their teachers from home to send or receive e.mail or talk their problems through “on-line” rather than attend a class.

The United States is a large country. It is the third largest in the whole world! It is located in a continent called North America. Parts of the United States touch three different oceans. The United States has tall mountains, wide plains, deserts, hills, rivers, lakes, volcanoes and even rainforests! People from all over the world have come to live in the United States. There are 50 states in the United States. The newest states, Alaska and Hawaii, are not connected to the other states. Alaska is the largest state and Hawaii is a chain of islands in the Pacific Ocean.

22.The United States is the _________ country in the world. 

A.   second largest         B.largest       C.smallest        D.third largest

23.Alaska is ___________ and Hawaii is __________.

A. a chain of islands/ the largest state            B. the largest state/ a chain of islands

C.a chain of islands/ the largest state D.not connected to the other states/ the largest state

24.The United States does not have ____________.

 A.50 states                 B. volcanoes                C. mountains   D.continents

25.Parts of the United States touch _________ different oceans.

A.1                  B.2                  C.4                  D.3

26.What continent is the United States in?

A.North America                    B.Australia                  C. Africa         D.Europe

16.I (watch) …………… a science fiction film on TV at 9 .00 tonight.

17.Look at those clouds – I think it (rain)………………………….………..

18- 19. If you use robots  to do the housework, you (become)………………………….. lazy and you (not get)…………….. enough exercise.

20. We (walk )………………………along the street, we saw an accident.

21. If you (not break) ………… the rules, the teacher will not punish  yo

6. She asked me ............. I came from

A. where         B. if                C. do               D. whether

7. She said  she ………. to the Moon when she had enough money.

   A. travel               B. to travel          C. would travel     D. travelling

8.  If we use water………., more people will have cleaner water.

     A. care                              B. carefully                   C. careless                   D. carelessly

9. The family took part ..................... a lot of activities in the festival.

     A. of                       B. on               C. at                D. in

10. If the teacher were here now, we’d ask him the difference ………. “science” and “technology”.

      A. among              B. of                            C. between                  D. for

11. How about ............. to Thien Cam beach this weekend?.

            A. go               B. going                      C. went                       D. gone

12. People who cannot hear or speak often communicate using ………..

     A.pictures                           B.sounds                     C.codes           D.signs

13. Teenagers spend most of their time playing computer game; ………., they lose their interests in daily activities.

        A.moreover                     B. so                C.however                   D. as a result

14. Science is used in all corners of the world for the ………. of people.

A.interest                    B.need             C.profits                      D.benefit

15. All our English teachers are .  .  .  .  .  speakers.

            A. native                     B. original                   C. foreign                    D. orginally

cho ΔΔABC vuông tại A có AB>AC . Lấy M là 1 điểm tùy ý . Qua M kể đường thẳng vuông góc với BC và cắt AB tại I ,cắt AC tại D

a/ CM :ΔABC∼ΔMDCΔABC∼ΔMDC

b/ CM : BI.BA=BM.BC

c/ CM : góc BAM=góc ICB từ đó  CM: AB là tia phân giác góc MAK (CI∩BDCI∩BD tại k)

d/ cho AB=8cm và AC=6 cm . Khi AM là tia phân giác trongΔABCΔABC hãy tính diện tích tứ giác AMBD