On ___side of the street there are a lot of high buildings,______there?

问题描述:

On ___side of the street there are a lot of high buildings,______there?
A、both;is B、each;are C、every;isn't D、either;aren't

选择D
side是单数,所以只能选择each / every / either
are的反义疑问句是用aren't
所以排除法,最终选择D