英语单项选择(初一)

问题描述:

英语单项选择(初一)
Look!there( )playing with the tourists on Yinhe square.
A.are a number of deer B.are a number of deers
C.is a number of deer D.is a number of deers
请细讲一下原因,a number of deer(s)的意思

A
a number of 很多的
deer单复数形式相同,是个可数名词,所以用are