It is really quite extraordinary that we should have been at the same college without ______ before.a.met b.being met c.having met d.having been met

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It is really quite extraordinary that we should have been at the same college without ______ before.a.met b.being met c.having met d.having been met

It is really quite extraordinary that we should have been at the same college without ______ before.a.met b.being met c.having met d.having been met
It is really quite extraordinary that we should have been at the same college without ______ before.
a.met b.being met c.having met d.having been met

It is really quite extraordinary that we should have been at the same college without ______ before.a.met b.being met c.having met d.having been met
用完成被动式是指彼此被对方碰到.另外,因为meet为及物动词,其后没有宾语,语法上不通,故也要示用被动式.

感觉D错了,C才对阿

c
应当用完成时,在句子中表示”过去的过去“;其次,应当是”We have met before“的变形。