How time flies!Three years _________reallt a short time.A.is B.ar_英语解答

How time flies!Three years _________reallt a short time.
A.is B.are C.was D.were

人气：384 ℃　时间：2019-08-21 17:18:01

解答

is
three years这里并不是强调"三",而是强调三年这个时间段,所以要将three years作为一个整体来看,用is