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

问题描述:

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 +see...