问题描述: there is a pair of trainers .回答是it's bIue 还是they're blue. 1个回答 分类:英语 2014-10-28 问题解答: 我来补答 it's bIue .问题针对的是 a pair of ,是 一 双,所以用单数来回答.如果问题是there are trainers ,回答就是they're blue. 展开全文阅读