Cho tam giác ABC vuông tại A có đường cao AH. Biết BH = 4 cm,CH = 9 cm. a) Tính độ dài đoạn thẳng AH,AB,AC. b) Gọi M là trung điểm của AC . Tính số đo góc BMC (số đo làm tròn đến độ). c) Kẻ AK vuông góc với BM tại K . Chứng minh góc ACB bằng góc BKH.

Nguyên nhân dẫn đến sụp đổ của CNXH Châu Phi và Đông Âu 

30. We bought a lot of books.

A lot of books...

31. He started writing that novel in 2009.

He has...

32. We/study/English/2012.

->

33. They/wish/weather/be/nice.

->

34. living room/clean/everyday.

->

Question 35.Mrs Lien started teaching in this school five months ago.

-Mrs Lien...

Question 36./ bottles/to/I/when/used/I/collect/was/ after school/young.

->

Question 37. two weeks / She /has/film/watched/this/ for.

->

Question 38. I/a lot of/famous / Hanoi /places/ visited/in/last year.

->

Part 6. Complete the second sentence so that it has the similar meaning to the first one

Question 29. Tom does the homework every day.

The homework

Question 31. We often went to Vung Tau at weekends.

We used

Part 7. Rearrange the following words into complete sentences:

Question32.Kuala Lumpur/is/Ha Noi / different / from?

Question 33.My mother /had/wishes/ she / a new dress

Question 34.be/ This problem / solved / can.