ĐÁP ÁN:

41.Sai Gon, which considered the Oriental Pearl is known as Ho Chi Minh City nowadays.

42. Unless You have to do it right now, you can't finish it by the dead line.

43. After We do an English course. We will speak English better.

44.There are many policeman outside some of whom have guns. 

45.Because I was poor, I had to leave school early.

46.Seldom does he go out at night. 

47.Never they have seen this phenomenon before.

48.Although Tom was unable see anything, Tom knew some one was in his room. 

49.Vietnam is the country which grows the most rice.

50.She is tired of finishing on time.
XIN CTRLHN Ạ 
HOK TỐT NHA ^^

41. Sai Gon, which considered the Oriental Pearl is known as Ho Chi Minh City nowadays.

42. Unless You have to do it right now, you can't finish it by the dead line.

43. After We do an English course. We will speak English better.

44. There are many policeman outside some of whom have guns

45. Because of being poor, I had to leave school early.

46. Seldom does he go out at night.

47. Never they have seen this phenomenon before.

48. Although Tom was unable see anything, Tom knew some one was in his room.

49. Vietnam is the country which grows the most rice.

50. She is tired of finishing on time.

`Jeikei`