Millie put up some signs ____ for old bikes,_____ she?

问题描述:

Millie put up some signs ____ for old bikes,_____ she?
A asked didnt B asking didn't C asking doesn't D asked doesn't

B
主语有谓语 put up(而且是过去时,put的过去式还是put,过去做的事,张贴告示),后面ask只能用非谓语形式,现在分词表示主动,signs ask for 告示要求.,(象 a sign read 一个标牌上写着,用主动语态不用被动的)
前面一句是过去时的肯定句,因此后面疑问用 didn't sheasking 是现在分词作定语吗?这里用作定语,修饰 signs ,怎么样的告示