80. My desk was repaired during the weekend.

81. She wasn't seen at the party last night.

82. The regulation hasn't been changed by the government.

83. I wasn't introduced to her mother.

84. The grass is being cut now.

85. This window ought to be repaired.

86. A letter is being written to his friend by Peter.

87. Some phone call are being made by my friends in the evening. ( Ở đây có some thì phone call phải có "s" )

88. Many accidents are being caught by bad drivers.

89. Football is played all over the world.

90. The contract will be signed tomorrow.

91. The library cards will be issued soon.

92. Her homework has to be finished by Thuy tonight.

93. Their weapons must be handed in.

94. My piano is being repaired at the moment.

95. John has just been examined by a doctor.

96. Many houses were destroyed by the fire yesterday.

97. Those books will be returned to the library tomorrow.

98. Flight 202 from Miami has been delayed by bad weather.

99. Your room must be kept tidy.

100. The prize is being awarded to the Thon Trieu team.

101. Some new equipment has been ordered by the company. ( Thường thì sau some sẽ là danh từ số nhiều nhưng ở đây equipment là ngoại lệ nên có thể coi là some new equipment là danh từ ngôi thứ ba số ít )

80. They repaired my desk during the weekend. =>My desk was repaired during the weekend

81. Nobody saw her at the party last night. =>she wasn't seen at the party last night

82. The government has not changed the regulation. =>The regulation hasn't been changed by the government

83. She didn’t introduce me to her mother.=>I wasn't introduce to her mother

84. Someone is cutting the grass now. => The grass is being cut now

85. Someone ought to repair this window. => The window ought to be repaired

86. Peter is writing a letter to his friend.=> A letter is being writtien tho his friend by Peter

87. My friends are making some phone call in the evening. => Some phone calls are being made by my friends in the evening

88. Bad drivers are causing many accidents.=> Many accidents are being caused by bad drives

89. People play football all over the world.=> Football is played all over the world

90. They will sign the contract tomorrow .=> The contract will be signed tomorrow

91. We will issue the library cards soon. => The library cards will be issued soon

92. Thuy has to finish her homework tonight. =>Her homework had to be finished by Thuy tonight

93. People must hand in their weapons. => Their weapons must be handed in.

94. They are repairing my piano at the moment. => My piano is being repaired at the moment.

95. A doctor has just examined John. => Jonh has just been examed by a doctor

96. The fire destroyed many houses yesterday. => Many houses were destroyed by the yesterday

97. Tom will return those books to the library tomorrow. => Thosebooks will be returned to the library by tom tomorrow

98. Bad weather has delayed Flight 202 from Miami. => Flight 202 from Miami has been delayed by bad the weather

99. You must keep your room tidy. => The room tidy must be kept

100. He is awarding the prize to the Thon Trieu team. => The prize is being awarded to the Thon Trieu team by him

101. The company has ordered some new equipment.=> Some new machines has been ordered by the company

Chúc bạn học tốt !