Question

_____her before, he didn`t know she was his aunt.

A Not see B Not havingseen C Not saw
D Having not see

Answer 1

选B.省略之后否定词要提前，这是其一。二，题目中只要有before你就要选完成时，是过去的时间就用过去完成，是现在的时间就用现在完成。（一定要记住这个做题法宝）三，Not havingseen =Because he had not seen her before。这是过去完成，表示过去的过去，与后面的he didn`t know she was his aunt.过去式形成了逻辑上的连贯。转换成汉语就是“因为他之前没有见过他的aunt，所以他不知道她”

Answer 2

应选B，这是一个原因状语的省略。补充出来应是：Because he had not seen her before，。。。。省略之后否定词要提前。这是必须的、

Answer 3

D