1. Students have to..................many subjects at school.

A. do                   B. play                     C. go                     D. study

Cái này dịch thôi: học sinh phải học nhiều môn học ở trường.

2. He liked......................in the river when he was a child

A. swim               B. swimming             C. swam               D. swims

                           sau like dùng V_ing

3. Lots of houses..............by my earthquake

A. are destroying     B. destroyed       C. were destroyed      D. is destroyed 

  Cái này thì mình ko bt giải thích sao cho bạn hỉu:<

4. A lot of flowers and trees.............grown in the Temple of Literature

A. are                       B. is                     C. do                   D. dose

        bị động,flowers and trees là số nhiều nên dùng are

5. Let me have......................

A. look                      B. a look              C. looking             D. looked

                       Let S.O do sth: để ai làm gì

6.It's a good idea to...................a trip to SaPa

A. takes                     B. taking              C. taken                 D. take

                                  Sau to là V nguyên mẫu

7. Some flim stars..............to be difficult to work with

A. said                       B. are said             C. say                  D. saying

         Dựa trên công thức It + be + V3 + that + clause.

8. They are visited..................their old friends

A. with                       B. in                     C. for                    D. by

                                       bị động thôi:)

9. All meat................before transportation

A. froze                        B. are froze          C. frozen            D. is frozen

                Từ khúc này ko giải thik nữa mợt quá ạ:v , bạn thông cảm

10. Souvenirs...............in the Temple of Literature

A are sold                     B. are sell               C. is sold        D. selling

11. Khue Van Pavilion is regarded the................of Ha Noi

A. icon                       B. thing                      C. sign             D. symbol

12.  English has become a second language in countries like India, Nigera, or Singapore where..............for administration, briadcasting and education

A. is used             B. it is used             C. used           D. being used

1.B

2.A

3.C

4.A

5.B

6.D

7.C

8.C

9.B

10.D

Thay x=0 thì y=-3.

         x=1 thì y =-4.

xong rồi vẽ thôi:)

1. -It isn't expected that the new party....

    -The new party won't expected to win the election.

2. -It is said that the principal....

    -The principal is said to be at large.

3. -It is known that the robber ....

    -The robber is known to have left the city.

4. -It is believed that giving ....

    -Giving encouragement is believed to be important at work.

5. -It is told that Mr Brown drank too much at the party.

    -Mr Brown is told to drink too much at the party.

6. -It is known that cars...

    -Cars is known to pollute the environment.

7. -It is believed that the robber...

    -The robber is believed to has been worked in the bank.

8. -It is believed that she is....

    -She is believed to be an honest person.

9. -It is thought that the president...

    -The president is thought to would arrive soon.

10. -People report that many passengers....

      -Many passengers is reported to die in the crash.

     Còn lại bạn dựa theo những câu trên và tự làm nhé! Mình có việc, bạn thông cảm ạ

Thai people, they have been in the Northwest of Vietnam for over 1200 years, are descendants of Thai immigrants from the land of Yunnan province, China now. Thai groups: Black Thai, White Thai, Thai Red. Some groups have little or no clearly defined population, such as Tay Muoi (living in combination with Tay Thanh and Tay Muong groups in Nghe An). Thai people have their own language and scripts. Ethnologists now refer to this group as the Thai-speaking group ... Austronesian-Thai. Since there is a common source, the Thai language has a high consistency. This is a feature that most people notice when exposed. This is monophonic, with tone. Construct sentences in order: predicate subject of other components. Thai people have a lot of experience, digging ditches, raising children, raising troughs for water for farming. Paddy is a staple food, especially sticky rice. Thai people also cultivate the rice fields, crops and many other plants. Each family raising cattle, poultry, weaving, cloth weaving, some places made pottery ... The famous product of the Thai people are brocade cloth, with unique patterns, brilliant colors, durable.

                                   Bạn tham khảo nhé!

Số tiền mà thành phố tiết kiệm đc là:

   36 x 10^-3 x 2 000 000 x 1800 = 3 888 000 000(đồng)

34. More and more people liked wearing________in the 1970s.

a. uniform                    B. jeans                       C. casual clothes        D. clothes

35.She wishes she ______ around the world.

A. can travel                B. could travel            C. travel                      D. traveling

36.A new hospital_______ next year.

A. will build     B. is built                      C. will be built              D. will be build

37. We will go ________a picnic tomorrow.

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

38. Nam used to ________ full time, but now he is a part time worker.

A. work                        B. working                   C. worked                   D. works

39.They told their parents that they _______their best to do the test.

A. try                           B. would try                 C. will try                     D. can try

40. Ba said he ________some good marks last semester.

A. gets                         B. got                           C.getting                      D. had got

41.If readers want to look for the titles of the books, they can find them in the_______

A. sheles                     B. sections                 C. card catalogue       D. corners

42. This magazine is _______ once a week

A. issue                       B. published                C. sold                         D . found

43. It's very noisy, I can't_______ you.

A. listen to                   B. hear                        C. see                          D. look at

44. The_______ of football team usually wears a coloured armband.

A. Captain                   B. forward                   C. goal keeper            D. defender

45. I tried hard but I coudn't_______him.

A. take                         B. gain                         C. win                          D. beat

46. They will build some_______across the river.

            A. bridges                    B. cottages                  C. houses                    D. monuments

47. You can't swim these because the banks are covered with_______

A. mud                        B. sand                        C. ships                       D. sheep

48. The_______of the sea makes him frightened.

A. great                       B. greatly                     C. greater                    D. greatness

49. That is a mini bus. It can carry only fourteen_______.

A. travelless                B. passengers      C. drivers                 D. conductors

50. Unfortunatly my car got stuck in a_______.

A. traffic-jam            B. traffic- light             C. traffic-sign              D.traffic-police

51. What_______when I was away from home ?

A. took on                    B. set off                     C. happened               D. foined

52. Television, radio, newspaper are means of_______

A. transpostation         B. communication       C. entertainment         D. sports man ship

53. He was_______ because he had done his work well.

A. promted                  B. raised                      C. pushed up               D. awarded

54. He made an interesting speech in the opening_______.

A. competition             B. preparation C. solidarity                 D. ceremony

55. A_______is a pesson who often has a red nose and a painted face in the circus.

A. manager                 B. acrobat                   C. clown                      D. trapeze

56. She did all the work_______her own.

A. by                            B. on                            C. for                           D. with

57. _______the time you get to the theater, the play will have finished.

A. until                         B. in                             C. by                           D. on

58. As _______as I know, we have not received a bill for the new computer.

A. much                      B. long                         C. soon                        D. far

59. Her father won’t _______her drive his car

A. allow                       B. let                            C. leave                       D. permit

60. His father allowed his ________ the party last week

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

a). Để giá trị k có (d₁) cắt (d₂) tại một điểm trên trục tung thì:

a≠a'  ⇔   k-3≠2k+1

         ⇒   k - 2k ≠ 1+3

        ⇒    -k      ≠  4

       ⇒     k      ≠ -4.

Vậy 2 hàm số đó cắt nhau khi k ≠ -4

b). Để giá trị k có (d₁) song sóng với (d₂) thì:

\(\left\{{}\begin{matrix}a=a'\\b\ne b'\end{matrix}\right.\)⇔\(\left\{{}\begin{matrix}k-3=2k+1\\-3k+3\ne k+5\end{matrix}\right.\)⇒\(\left\{{}\begin{matrix}k=-4\\k\ne\dfrac{-1}{2}\end{matrix}\right.\)

Vậy 2 hàm số đó song song với nhau khi k=-4.