Cau 3.
Ta co: \(x+2x+3x=180^o\)(tong 3 goc trong 1 tam giac)
    \(\Rightarrow x\left(1+2+3\right)=180^o\)
    \(\Rightarrow x=30^o\)
Vay so do ba goc cua tam giac lan luot la: \(30^o,60^o,90^o\)

3. Many trees and flowers/ the gardeners (take care of)

-> Many trees and flowers are taken care of by the gardeners.

4. The Temple of Literature/ one of the most important cultural and historic places/ in Viet Nam. (consider)

->The Temple of Literature is considered one of the most important cultural and historic places in Viet Nam.

5. Lots of souvenirs/ inside the Temple of Literature (sell)

->Lot of souvenirs are sold inside the Temple of Literature.

6. Khue Van Pavillion/ the symbol of Ha Noi (regard)

->Khue Van Pavillion is regarded as the symbol of Ha Noi.

7. The Temple of Literature/ in 1070 (found)

->The Temple of Literature was founded in 1070.

8. The Imperial Academy / under Emperor Ly Thanh Tong (construct)

->The Imperial Academy was constructed under Emperor Ly Thanh Tong.

9. The Doctors’ stone tablets/ King Le Thanh Tong (erect)

->The Doctors' stone tablets were erected by King Le Thanh Tong.

10. The imperial Academy/ the first university/ in Viet Nam (regard as)

->The imperial Academy is regarded as the first university in VietNam.

11. In 1483 the Imperial Academy/ Thai Hoc Vien (rename)

-> In 1483 the Imperial Academy was renamed Thai Hoc Vien. 

12. The 82 Doctors’ stone tablets/ UNESCO (recognise)

->The 82 Doctor's stone tablets are recognised by UNESCO.

20. ___Have_____ you ever (fly) ___flown______ a helicopter before?

21. Have you already (play) played the new computer game?

22. These students (study) have studied English for four years.

23. She (come) has come up to now.

24. He recently (arrive) has arrived from New York.

25. We (not/ finish) haven't finished the English tenses so far.

26. Have you ever (go) gone abroad?

27. She (not/talk) hasn't talked to me over the last 4 days.

28. It (rain) has rained in the past week.

29. Up to the present, he (write) has written five children books.

30. I (learn) have learned English since 2002.

31. How long have you (know) known Tom?

C

C. is

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

ồ :Đ

câu 3 bạn nên để taxi driver cho nó đúng với câu trên nhé.

nhưng nếu biết là mình sai hoặc không chắc chắn về câu trả lời thì mình đừng làm chứ em, chứ ai lại lao vào mà làm trong khi không biết đúng sai, mang tiếng chết!