41. After I had finished my lessons, he sang an English song while I was talking to Mr. Tien.

42. Before he went to work, he had a quick breakfast.

43. Did you review for the exam yesterday? 

44. He has already taken breakfast. 
45. Did he receive a letter yesterday?

46. Have you finished that work yet? .

47. This is the most interesting book I have ever read.

48. It is still raining now.

49. He painted this shirt yesterday. 
50. The crowd were cheering when Nam won the race. 
51. Ba is keen on playing volleyball at this time.
52. Before he traveled to England, he had studied English for two years.
53. We are happy.

54. The boys have got good marks.

55. The teacher let the students play volleyball at this time.

56. They have traveled/studied to London since they were young.

57. The children have opened their books when they did the test.

58. I am very tired. I have been swimming in the river at this time last Sunday.

59. My son has worked hard all day. .

60. His father stopped smoking cigarettes two years ago.

61. Lan is practising English at the moment.

62. She has already visited Halong Bay before.

63. I go fishing twice a week. .

64. After they had had dinner, they watched TV.

65. Last night, I saw a thief stealing the neighbours' bike.

66. These clothes need to be washed. They are very dirty.

67. Look at them! They are doing their homework while my brother and sister are watching TV.
68. Would you mind opening the door? It is very hot.

69. I suggest taking a shower instead of a bath to save water.

70. Miss Hoa has just bought a new motorcycle.

71. Long sent his girlfriend a letter yesterday.

72. The soccer match had already begun when we arrived at the stadium.

73. It is no use reading that novel. It is boring.

74. I did not see him yesterday.

75. The Pikes have lived in Liverpool since 1990.

76. We have not taken a bath yet.

77. The students are writing the lessons now.

78. You had better learn harder on your exam.

79. The room is very dirty. It needs cleaning.

80. It took him an hour to do these exercises yesterday. .

81. I suggest going to school or work by bikes to save energy.

82. Before they married, they built a house.

83. I am used to getting up early every morning.

84. We are interested in watching films. 
85. The police let the thief go away.

86. I am used to staying up late. 
87. Learning English is important.

88. I heard the neighbours crying last night.

89. This novel was written by Mr. Anh.

90. He often has his wife prepare meals.

91. The students are fond of reading books.

92. These boys like playing soccer.

93. Mr. Nam is always busy working on the farm.

94. I sometimes make my parents feel sad.

95. This room is very dirty. It needs cleaning.

96. He seemed amazed to hear that new.

97. This film is worth watching. It is very interesting.

98. The students are eager to know their marks.