the days are long为什么要用复数?

the days are long为什么要用复数? the days are long为什么要加S 为什么要加s?The days are long and the nights short.The sun rises The days are longer中,为什么要用“are” 这几个词为什么要加sWhich seasons do you like best?The days are long a The days are long and the nights are short The days are s_____ and t____ n____ are long. seven days is a long time为什么要用is When are the days long and the nights short Because the long noodles are a symbol of long life.为什么这里要用ar The Days Are Long and Filled With Pain 的歌词 The days are long and filled with pain