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