cho hình vuông ABCD. Gọi E, F, K lần lượt là trug điểm của AB, AC, CD.

1, CM : AECK là hình bình hành

2, CM : \(DF\perp CE\) ở M

3, AK cắt DF tại N . Chứng minh N là trug điểm của DM.

4, CM : AM = AB

Giair phương trình

a, \(3\sqrt{\left(x+1\right)\left(x-3\right)}+x^2-2x=7\)

b, \(\sqrt{2x+3}+\sqrt{x+1}=3x+2\sqrt{2x^2+5x+3}-16\)

c, \(\left(x^2-4\right)+4\left(x-2\right).\sqrt{\frac{x+2}{x-2}}=3\)

d, \(\frac{9}{x^2}+\frac{2x}{\sqrt{2x^2+9}}=1\)

e, \(3\sqrt{2+x}-6\sqrt{2-x}+4\sqrt{4-x^2}=10-3x\)

viết lại câu :

1, Susan isn't as good at chemistry as Sarah.

-> Sarah is.......................................................

2, No one is the group is younger than he.

-> He is the..........................................

3, Stone isn't as hard as iron.

-> Iron is ......................................

4, Tom is the best football player in the team.

-> No one in the team is.....................................

5, I don't play the guitar as well as he does.

-> He plays....................................................

6, My sister is taller than any other student in the class.

-> My sister is the .........................................................

7, No other city in VN is as large as HCM city.

-> HCM city...............................................................

8, This story is more interesting than any other stories that I have ever heard.

-> This is the................................................................

9, My father can't cook as well as my mother does.

-> My mother cooks ................................................

10, My sister is taller than any other students in the class.

-> My sister is the........................................................

Give the correct form of comparisom degrees:

1, Paul is (tall ).......................... Jack.

2, Your ring is ( expensive )......................... my ring.

3, It's ( difficult ).................................... exercise I've ever seen.

4, It's ( small ).................................. house I've ever seen.

5, Mark is ( fat ) ............................of his family.

6, He is ( rich )............................... his brother.

7, My sister is ( intelligent )............................. than you.

8, She is ( beautiful )................................. girl in her class.

9, My brother is ( tall )............................. me.

10, Nancy is ( intelligent )....................... girl in the classroom.

11, This dress is ( expensive )....................... those shoes.

12, Is I talian food ( good ) ......................... American food ?

13, My cat is ( big )........................... your dog.

14, Your dog is ( small ) ........................... my cat.

15, Mary is ( young )...................... of all the students in the classroom.

16, A diamond is ( solid ).......................... wood.

17, Davis is ( good ).................................... soccer player in England.

18, Carla is ( pretty )............................... Stephanie.

19, For me Issa Bolt is ( fast )............................. man in the world.

20, Your son is ( smart )................... kid in have ever met.

21, I have ( good )............................... marks in English than in French.

22, The car is ( slow )................ the plane.

23, The gloves are ( cheap )............................... the T- shirt.

24, The armchair is ( heavy )..................... the chair.

25, Susan is ( short )............... of the three

26, Geography is ( interasting )........................... History.

27, His class is ( tidy ).................. of all.

28, My siste is ( fat )............................... my brother.

29, My calssroom is ( clean )...................... your classroom.

30. The story about the ghost is ( frightening )................................ the story about the magician.

31, Ben is ( tall )............................. boy in the class.

32, My score is 90 and Betty's score is 89.5 ; my marks are ( high )................. Betty's mark.

33, Among the blue, pink and purple dresses, which one is ( beautiful )............?

34, If you use a heater, your room will be ( warm )........................... it is today.

35, Do you think that Daniel is ( handsome ).......................... Billy?

câu hỏi đuôi :

31, The children are playing games,..............?

32, All the lights went out,.............................?

33, The computer has broken down ,.............?

34, Lan learn to read as a child,......................?

35, She seldom góe to church,.........................?

36, Your father has bought a bicycle,................?

37, No thing is wrong,......................................?

38, It is a nice Sunday,....................................?

39, Tom and You can run very fast,................?

40, It never works very hard,..........................?

41, I have not got a picture of him,...................?

42, She smiled to him beautifully,..................?

43, The doors were locked,..............................?

44, Let's start this exercise,................................?

45, He does not keep his promise,......................?

46, Jane ***** not want any dinner,.........................?

47, You have not seen this film before,..................?

48, They are going home,.......................................?

49, Everything is OK,..............................................?

50, I am not having lunch,.....................................?

52, Linh starts working 6 months ago,.....................?

52, Laure had hurt her leg,...........................................?

53, She wasn't at home,...........................................?

54, My grandmother loved music ,............................?

55, They found themselves in the forest,...............?

56, I think you have seen this once before,................?

57, This picture was taken to Paris,..............................?

58, That must be John't house,........................................?

59, You have had your hair cut,......................................?

60, Today is not Monday,...........................................?

61, We took this one last year,.................................?

62, She looks just like Mary,.............................?

63, You can deliver this good to my house,...............?

64, She is still working there,.......................................?

65, There is a tree in front of my house,.........................?

66, Stand up,..........................................................?

67, Mai is talking with me,.........................................?

68, I spent three hours doing my homework,...................?

69, Your bike is stolen,........................................?

70, Their dog is over there,.........................................?

Câu hỏi đuôi :

2, They have not been to HN ,...................?

3, Tom wanted to go to Paris,......................?

4, You should not drink much coffee,...........?

5, Nobody likes him,.....................................?

6, England is a beautiful country,..................?

7, I am a student,...........................................?

8, Do sit down,..............................................?

9, I am late,....................................................?

10, I am supposed to be there,.........................?

11, There are many people in the room,...........?

12, It was not a good film,...............................?

13, Mary is here,.............................................?

14, Tom and David wanted to go to school,...........?

15, Everyone took a car,.......................................?

16, Let's have a drink,..................................?

17, He works for this copany,......................?

18, He hardly has a mistake,..........................?

19, The Greens will travel to Hue,....................?

20, No one likes the play,................................?

21, This won't take long,............................?

22, There used to be a house here,..............?

23, Give me a hand, ..................................?

24, They never have a good car,...................?

25, This is your camera,................................?

26, Everyone went out for a drink,................?

27, Mike will meet her tomorrow,....................?

28, That is not Bill driving,.............................?

29, Neil Armstrong was the first man to walk on the moon,...........................?

30, These are your books,........................?