I. Change the active sentences into passive sentences of past simple

1. How many books did they usually read?

2. who wrote a book?Who did he visit?

3.What did you do yesterday?

4. He used to clean the house.

I. Change the active sentences into passive sentences of present simple

1.John earns much money. every year

2.Anna opens the window.in the room

    3.We do our homework.                             

    4.I ask a question.

    5.The sheep eat a lot of grass                                  

    6.We do not clean our rooms.

    7.William does not repair the car.               

    8.Does Sue draw this circle?

    9.Do you feed the dog?                              

  10.What do you do every day?

 11. Where does he often buy vegetables ?   

 12. How many books do they usually read?

  13. who writes a book?                                             

  14. He  cuts out the picture.

 15. Who does he visit ?                                 

 16.I have to do a test

Question 42-51: In three of the four words, the underlined part is pronounced the same; in the fourth word the underlined part is pronounced differently. Find the fourth word.

42. a. held                   b. flew                         c. mend                       d. tent

43. a. quiet                 b. industry                  c. relative                    d. participant

44. a. nothing             b. clothes                    c. hold                         d. told

45. a. bear                  b. ear                          c. tear                          d. hear

46. a. lot                      b. floor                        c. box                          d. dog

47. a. small                 b. law                          c. tall                           d. plane

48. a. float                  b. noun                       c. about                       d. out

49. a. arrive                b. abroad                    c. around                    d. armchair

50. a. snowy               b. cold                         c. prison                     d. Chicago

51. a. great                 b. hate                         c. heat                         d. afraid

Bài 1: Không làm tính, xét xem tổng sau có chia hết cho 12 không ? Vì sao ?

a)    120 + 36

b)    120a + 36b ( với a ; b \(\in\) N )

Bài 2: Cho A = 2.4.6.8.10.12 - 40. Hỏi A có chia hết cho 6 ; cho 8 ; cho 20 không ? Vì sao?

Bài 3: Khi chia số tự nhiên a cho 36 ta được số dư 12 . Hỏi a có chia hết cho 4 ; cho 9 không, vì sao ?

Chứng minh rằng:

a) ab - ba \(⋮\) 9 (a > b)

b) Nếu ab + cd \(⋮\) m thì abcd \(⋮\) m