将下列句子改为被动语态 快.

题目

将下列句子改为被动语态 快.
1、 Tom asked me to open the door
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2、I picked up some stamps in the room
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3、Someone invited me to the party
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4、The university had admitted him
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答案

1.I was asked to open the door by Tom.2.Some stamps in the room were picked up by me in the room.3.I was invited by someone to the party.4.He was admitted by the university.