Tom ____ into the room secretiy last night.A. was seen climb B. was seen to climb C.was seen climb D. saw to be climbed要解释!

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Tom ____ into the room secretiy last night.
A. was seen climb B. was seen to climb C.was seen climb D. saw to be climbed
要解释!

B
汤姆被别人看到,用被动语态.
see sb do sth “看到某人做了某事”,see 是感官动词,主动时,省略to,
被动时必须加上to,即 sb be seen to do sth “某人被看到做了某事”
希望我的回答能够帮到你,

B 感官动词/使义动词变被动时,省去的不定式to要加上。

B ( see sb do sth 看见某人做某事,变被动语态时,动词不定式要用回TO: sb be seen to do sth )