------of my parents is poor-educated,they left school when they were 13.A.BothB.AllC.NeitherD.None

问题描述:

------of my parents is poor-educated,they left school when they were 13.A.BothB.AllC.NeitherD.None
别蒙我(急!)

A.Both.
all of 是指三者或三者以上都;neither of是两者都不;none of是三者或三者以上都不.