How time flies!There years___really a short time.A.is B.are C.was D.were.这题.大虾们出手!

There years----Three years 为整体,这类表时间,距离,金钱的词不论多少,做主语时,要看成一个整体,谓语动词用单数.
Fifty yuan is not enough.
Thrity kilometers is a long way.

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