=>
80. He was seen to pick up the gun.
81. He shouldn't have been told.
82. He wants an article to be written by her.
83. They want the manager to be replaced.
84. Lan's mother was taken to the hospital by her.
85. This lesson should be learned by heart.
86. A new station is being built by the workers.
87. This motor hasn't been used for a long time.
88. We aren't told this project by her.
89. I think everybody should be told about it.
90. She would like she to be invited to the party.
91. Such things ought to be spoken in public by us.
92. Why should this have been done?
93. Someone could be heard to open the back window.
94. This problem can't be explained.
95. That work could be done by these boys.
96. That boy was seen to go out.
97. Mary has just been sent many post cards.
98. Does grass have to be grown?
99.  Two new dresses have been bought by her.
100. He is called pop singer.