Do you know who was the last person___the room yesterday afternoon?A:leave B:leaving C:to leave D:left还是搞不明白为什么不选D,为什么是过去进行时?

Do you know who was the last person___the room yesterday afternoon?
A:leave B:leaving C:to leave D:left
还是搞不明白为什么不选D,为什么是过去进行时?

was后面要加ing
比如,i was shopping yesterday
we were going to fishing yesterday

一个句子不能有两个或多个谓语，因此要填非谓语，所以A错，因为是yesterday，C项不定式表将来意思，错。person离开，动作与人是主谓关系，所以用ing

过去进行时，was/were doing sth

答案应该是C吧！
序数词后面跟不定式,比如the first to come, the last to leave就是最经典的例子,"第一个来,最后一个走".该用法可以作为定于修饰成分,符合以上要求.

前面有WAS所以．．．