53,If I don't have a quiet room, I won't be able to do anything

54,It has rianed for an hour

55,She hasn't visited me for five years

56,If we don't hurry up, we will be late for the exam

57,How long have you learned English?

58,If you are careless, you may fall

59,We have lived here for fifteen years

60,We have become close friends for a long time

61,The last time we visited my grandparents was two months ago

62,Unless we try to save our sources of energy, it will soon end

63,Minh has collected stamps since 2000

64,I have never talked to a foreigner before

65,Today VTV3 has three interesting films

66,It's five years since my brother last met his best friend

67,Unless you keep your feet dry, you will catch a cold

68,Unless we try to save our sources of energy, it will soon end

69,If we use the car all the time, we will make the air dirty

70,If we don't leave now, we will miss the plane

71,I began studying English three years ago

72,Unless I leave now, I will miss my train

73,You must do your homework

74,If I don't have a modern robot, I won't be able to do everything myself

75,I haven't seen Ann since yesterday

53.→If I don't have a quiet room,I wouldn't be able to do anything.

54.→It has rained for an hour.

55.→She hasn't visited me for 5 years.

56.→If we don't hurry up,We will be late for the exam.

57.→How long have you learned English?

58.→If you are careless,You may fall.

59.→We have lived here for fifteen years.

60.→We have become close friends for a long time.

61.→The last time we visited my grandparents was two months ago.

62.→Unless we try to save our sources of energy,It will soon end.

63.→Minh has collected stamps since 2000.

64.→I have never talked to a foreigner before.

65.→Today VTV3 has three interesting films.

66.→It's five years since my brother last met his best friend.

67.→Unless you keep your feet dry,You will catch a cold.

68.→Unless we try to save our sources of energy,It will soon end.

69.→If we use the car all the time,We will make the air dirty.

70.→If we don't leave now,We will miss the plane.

71.→I began studying English three years ago.

72.→Unless I leave now,I will miss my train.

73.→You must do your homework.

74.→If I don't have a modern robot,I won't be able to do everything myself.

75.→I haven't seen Ann since yesterday.

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