it is late into the night .all ___quiet in the street.A.is B.was C.will be D.are (选A)

it is late into the night .all ___quiet in the street.A.is B.was C.will be D.are (选A)
it is late into the night .all ___quiet in the street.
A.is B.was C.will be D.are (选A)

it is late into the night .all ___quiet in the street.A.is B.was C.will be D.are (选A)
这里表示所有的一切,指整体所以用单数了,根据前面的时态,所以后面用一般现在时

此题中的all指的是所有的一切事物，是一个抽象概念。