1.        (you/ ever be)        Have you ever been                                 to Ha Noi?

2.        Our school performance (start)             started              late last Sunday because of the heavy rain.

3.     Mai       bought     (buy) a new dress last week, but she _    haven't worn    (not wear) it yet.

16. Our horses……………….

  A. are well feeded                   B. are well fed                           C. is well fed                           D. is well feeded

17. The story I‘ve just read ……………….Agatha Christie.

  A. was written                          B. was written by                      C. was written from                  D. wrote by

18. Something funny……………….in class yesterday.

  A. happened                            B. was happened                      C. happens                               D. is happened

19. Many US automobiles ……………….in Detroit, Michigan.

  A. manufacture                        B. have manufactured               C. are manufactured                 D. are manufacturing

20. Beethoven‘s Fifth Symphony……………….next weekend.

  A. is going to be performed                                                       B. has been performed                           

  C. will be performing                                                                D. will have perform

21. The new computer system ……………….next month.

  A. is be installed                      B. is being installed                    C. is been installed        D. is being installed by people

22. The telephones……………….by Alexander Graham Bell.

  A. is invented                          B. is inventing                           C. invented                               D. was invented

23. Lots of houses……………….by the earthquake.

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

24. Gold……………….in California in the 19^th century.

  A. was discovered                   B. has been discovered            C. was discover                        D. they discover

25. The boy……by the teacher yesterday.       A. punish          B. punished      C. punishing              D. was punished

Everything……………….               A. are going to be forgotten            B. is going to be forgotten

                                                              C. is going to be forgot             D. were going to be forgotten

There‘s somebody behind us. I think we are ……………….

  A. being followed                    B. are followed                         C. follow                                   D. following

All bottles ……………….before transportation.

  A. frozen                                 B. is frozen                                C. was frozen                          D. were frozen

Đặt tên xong thêm chữ CTV VIP vào là đc nhe

Tham Khảo

So sánh 3 quá trình nhân đôi, phiên mã, dịch mã:

- Giống: Đều dựa trên nguyên tắc bổ sung

- Khác:

+ Nhân đôi ADN: Nguyên tắc BS giữa A - T và G - X.  Phiên mã: NTBS giữa A - U, G - X, X - G, T - A.  Dịch mã: NTBS giữa A - U và G - X. 

+ Nhân đôi ADN: 2 mạch của ADN đều làm khuôn. Phiên mã: mạch gốc của gen làm khuôn. Dịch mã: mARN làm khuôn

+ Thành phần enzim tham gia: Nhân đôi ADN: nhiều loại: tháo xoắn, ADN polimeraza,, ARN polimeraza, ligaza,... Phiên mã: ARN polimeraza. Dịch mã: thực hiện nhờ ribosome

+ Có ý nghĩa: Nhân đôi ADN: Từ một ADN mẹ tạo thành 2 ADN con giống nhau và giống ADN mẹ ban đầu, giúp ổn định vật chất di truyền. Phiên mã: Từ thông tin di truyền trên ADN được truyền sang phân tử ARN. Dịch mã: Giải mã thông tin trên mARN thành trình tự axit amin trên chuỗi polipeptit.

B

34. An didn’t used (play) ………to play…….. football in the afternoon. Now he often does it.

35. Nam (learn) ……………………has learned…..............…….. English for 8 years.

36. Last night, my father (watch) …….......watched...…………………..TV.

37. Ba and I (visit)…………........will visit............………..  Ha Long Bay this summer vacation.

38.  I like (work) …………...working.......…..........………….. as a volunteer for that orphanage.

39. Quang Hai footballer (play) __played_____ soccer beautifully last Saturday.

40. He (go) _goes__ to the English club every Sunday. But last Sunday he (not go) ___didn't go_____ there, he  went  to the City’s museum.

41. Two years ago, she (teach) ___taught_______  at a village school.

42. What  _____did_____you (do) ___do_________  yesterday morning?

43. We (travel) ________will travel______________ to Hue next month.

44. My mother (not like) _______doesn't like_____   riding a motorbike.

45. When my father was young, he (drink) ____drank______ a lot of beer.

46. Nam (study) _____is studying____ homework in the living room now.

47. Be careful ! The car (come) _____is coming____.

48. My mother (go) ____went______ to the supermarket yesterday evening.

1.     1,The accident (cause) ……was caused……………………………….by the fast truck driver YESTERDAY.

2.     This house is quite old. It (build)…………have built….………….FOR over 100 years.

3.     The phone rang while An (PLAY) ………was playing………………….……….. sport .

4.     Her son (not visit) ………………didn't visit……………………………her a long time ago .

5.     I’d like to meet a ghost, but I (not see)…………haven't seen……………..…………one yet .

6.     Thanh  (live) ……has lived………….here since 2010. They (not be) ………haven't been………there for a long time.

7.     They (not live)…………haven't lived………… in that house since it (build) …………built………...........

8.     20 cigarettes (smoke)…………is smoked………………by my father everyday.

9.     John and I (be) ………………were……………..….…… .  pen pals in 2000.

10.            Paper money (not use)……………hasn't been used……………….………….for over a thousand years.

11.            Almost every one (not enjoy)…………didn't enjoy……………….the lecture last night.

12.            English (teach)………………is taught………..……… in the schools of almost every nation.

13.            That old rest house (build)…………has been built………… since 1882.

14.            Her bike (fix)……………is fixxing……………………… at the moment.

15.            This book (return)…………will …be returned…………….…… to the library tomorrow.

16.            Many trees (cut) ………………are cut…………………… down for supply of wood everyday.

17.            The name of the new town (choose)……………was choosed…….……… by the committee yesterday ?.

18.            Many books (write) ………………have been written……………….……………..for a month .

19.            He hates (tell) ………………telling………………what to do.

20.            The baby likes (hold) ………holding……………………. by her mother.

21.            They're afraid of (attack) …………attacking………… because the neighborhood is dangerous.

22.            Martha hates (ask) ……………asking…………….. to stay late at work

chậm như lười ??

rùa đâu ='))

A