______ earlier,I would not have attended
______ earlier,I would not have attended
______ earlier,I would not have attended the Christmas party.What a big mistake I made!
(1) Did I know
(2) If I knew
(3) By knowing
(4) Had I known
应该选几?要原因
______ earlier,I would not have attended the Christmas party.What a big mistake I made!
(1) Did I know
(2) If I knew
(3) By knowing
(4) Had I known
应该选几?要原因
英语人气：236 ℃时间：2020-04-01 17:38:20
优质解答
D要原因因为根据意思可知是过去的过去，可知为ifi had known又因为had提前，if可省略，这是if虚拟语气中的特殊情况哦懂了
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