She was seen_____paper planes in the room.A.to make B.making 为什么选A呢?B也可以啊.

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Shewasseen_____paperplanesintheroom.A.tomakeB.making为什么选A呢?B也可以啊.Shewasseen_____paperplanesintheroom

She was seen_____paper planes in the room.A.to make B.making 为什么选A呢?B也可以啊.
She was seen_____paper planes in the room.A.to make B.making 为什么选A呢?B也可以啊.

She was seen_____paper planes in the room.A.to make B.making 为什么选A呢?B也可以啊.
感官动词或使役动词使用省略to的动词不定式,主动语态中不带to ,但变为被动语态时,须加上to .make somebody do something → somebody+ be +made to do something
  see somebody do something → somebody +be +seen to do something

都可以

was seen_ 看这里用了被动语态
意思是某人被看见做了某事
可以这样理解 somebody be seen to do something
希望能采纳,谢谢了

这个是被动用法,be seen to do
sb see her doing/do sth