61. Mary wishes she was able to speak English well.

62. This stadium started to be used 3 years ago.

63. If we had had a map, we wouldn’t have hot lost.

64. Peter asked if he could borrow Janet's typewriter.

65. It has been 5 years since we vissited Ha Long Bay.

Mờ quá bạn ơi

32. A

33. C

34. D

35. B

Chào em, em tham khảo nhé!

32. A

33. C

34. D

35. B

Chúc em học tốt và có những trải nghiệm tuyệt vời tại olm.vn!

41. C => because

42. D => in

43. C => working

44. D => well

45. C => will enter

41.C so => because

42. C. was => were

43. ??

44. C.she => her 

45. C. eater => will eat 

~ Hok T ~~

6. C

7. A

8. D

9. B

10.D

11. A

12. D

6C

7D

8A

9B

10A

11A

12B

ĐÂY TA LỚP 9 À 

13. B 

14. D 

15. B 

16. A 

17. B 

18. B 

19. C 

20. C 

21. B 

13 A

14B

15D

16B

17B

18A

19C

20C

21D

29. B

30.D

31.  C

Mờ quá bạn ơi

1. aren't

2. watch

3. had studied

4. to ride

5. be built

1.They(not be).......arn't.........good at math,so they got bad score.

2.What tine did he (watch)....watch............TV last night?

3.If i (study).........studied........harder,I would have passed the exam.

4.The boy is too young (ride)............to ride...........a motorbike.

5.A modern hospital should (build)...........be build..............in thistown soon.

1.They (not be) were not good at math,so they got bad score.

to be good at/ bad at + N/ V-ing

2.What tine did he (watch) watch TV last night?

(?) Hỏi: với động từ thường ở thì quá khứ đơn

3.If i (study) had studied harder,I would have passed the exam.

Câu điều kiện loại 3: ( If + thì quá khứ hoàn thành ),  ( would + have + V3/V-ed )

4.The boy is too young (ride) to ride a motorbike.

Cấu trúc: S + be/V + too + adj/adv + ( for somebody ) + to V

5.A modern hospital should (build) be built in thistown soon.

Câu bị động của động từ khiếm khuyết: Should + V -> Should + be + V3/V-ed

1.They(not be)..........aren't......good at math,so they got bad score.

.2.What tine did he (watch).......watch.........TV last night?.

3.If i (study)........had studied.........harder,I would have passed the exam.

4.The boy is too young (ride)..........rides.............a motorbike

.5..A modern hospital should (build).........build................in thistown soon.

\(P=6x+10y+\frac{16}{x}+\frac{3}{y}\)

\(=9x+\frac{16}{x}+12y+\frac{3}{y}-\left(3x+2y\right)\)

\(\ge2\sqrt{9x.\frac{16}{x}}+2\sqrt{12y.\frac{3}{y}}-5\)

\(=31\)

Dấu \(=\)xảy ra khi \(x=\frac{4}{3},y=\frac{1}{2}\).

\(\sqrt{x-3}\)\(\le\)\(\sqrt{6-x}\)

=> \(x-3\)\(\le\)\(6-x\)

<=> x+x \(\le\)6+3

<=> 2x\(\le\)9

=> \(x\le\frac{9}{2}\)

bạn kia giải thiếu điều kiện xác định rồi

\(ĐKXĐ:3\le x\le6\)

Ta có:\(pt\Leftrightarrow x-3\le6-x\Leftrightarrow2x\le9\Leftrightarrow x\le\frac{9}{2}\)

Kết hợp với điều kiện xác định \(\Rightarrow3\le x\le\frac{9}{2}\)

Vậy tập nghiệm của bất phương trình là:\(3\le x\le\frac{9}{2}\)