问题描述： How long is the holiday?holiday不是可数名词吗?为什么不用复数? 1个回答 分类：英语 2014-10-03 问题解答： 我来补答 这里指节日,故用单数,再如：Christmas is the world's most popular holiday.指假日的时候,有时可以用holidays,如,They are planning to spend their holidays in Thiland. 展开全文阅读
