问题描述：
几道英语被动语态的题,
1、We often see him help his classmates.
He( )often( )( )help his classmates(by us).
2、Who is repairing the bike?
By whom( )the bike( )(
1、We often see him help his classmates.
He( )often( )( )help his classmates(by us).
2、Who is repairing the bike?
By whom( )the bike( )(
问题解答：
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