(Not knew )what was wrong with him ANot knew BNot known CNot knowing

问题描述:

(Not knew )what was wrong with him ANot knew BNot known CNot knowing
(Not knew )what was wrong with him
ANot knew BNot known CNot knowing DNot to know
为什么选a

因为没有上下文,所以只可能是以前不知道但现在知道了.所以以前不知道就用过去时Not knew,而且从句是过去时,主句也要用过去时