when i got there,i saw some boys ____on the playground .空内应填什么很着急,中间的选项有:A playingB played C to playD was waiting

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when i got there,i saw some boys ____on the playground .空内应填什么很着急,中间的选项有:A playingB played C to playD was waiting

when i got there,i saw some boys ____on the playground .空内应填什么很着急,中间的选项有:A playingB played C to playD was waiting
when i got there,i saw some boys ____on the playground .空内应填什么
很着急,中间的选项有:
A playing
B played
C to play
D was waiting

when i got there,i saw some boys ____on the playground .空内应填什么很着急,中间的选项有:A playingB played C to playD was waiting
see sb doing,看见某人正在做某事,所以选A

A