67. Because of the heavy rain, we couldn't go to school.
→ Because it was raining heavily, we couldn't go to school.

68. Because her mother was sick, Hoa stayed at home.
→ Because of her mother's sickness, Hoa stayed at home.

69. She went to bed early because she was tired.
→ Because she was tired, she went to bed early.

70. Although Nam took a taxi, he still arrived late for the concert.
→ Despite taking a taxi, Nam still arrived late for the concert.

71. Although the traffic was bad, I arrived at the cinema on time.
→ Despite the bad traffic, I arrived at the cinema on time.

72. We should study hard for the final exam now.
→ It's time we studied hard for the final exam.

73. Quang would rather stay at home to study than go out for a walk.
→ Quang prefers staying at home to study rather than going out for a walk.

74. Lan spent two hours doing her homework every evening last year.
→ Lan used to spend two hours doing her homework every evening last year.

75. I haven't seen that man before.
→ It's the first time I've seen that man.

76. She hasn't visited her former school for five years.
→ The last time she visited her former school was five years ago.

77. I last met her in 2010.

78. He has worked for this company for two years.
→ It's been two years since he started working for this company.

79. Learning a little English is very necessary today.
→ It's essential to learn a little English today.

80. It took us 30 minutes to open the door.
→ We spent 30 minutes opening the door.

81. The last time I visited Thailand was two years ago.
→ I haven't visited Thailand for two years.

82. He often had long hair and a thick mustache.
→ He used to often have long hair and a thick mustache.

83. It's a pity she is absent from the party.
→ She wishes she could attend the party.

84. He often went hunting when he lived in the mountains.
→ He used to often go hunting when he lived in the mountains.

85. People were watching the match on TV.
→ The match was being watched on TV.

86. Someone has stolen his laptop.
→ His laptop has been stolen.

87. Susan wrote some famous plays.
→ Some famous plays were written by Susan.

88. "Can you wait for me here, Jerry?"
→ Tom told Jerry, "Can you wait for me here?"