消息不可数,为什么加s呀?This is a exciting news!

消息不可数,为什么加s呀?This is a exciting news! This is a piece of exciting news=＿exciting news it is! news不是不可数名词吗为什么可以加s? What an exciting news it is.为什么news能加an呢? this is a ------(exciting,worrying,worried)news.i don't thin why is Tim finding this trip exciting中的exciting为什么要加ing? this good news cheers me为什么cheer要加S? there ( )some exciting news in today's newspaper A.is B.are This news is really exciting. 改成定语从句 What an exciting news.为什么要加an啊? 1、There is ____ exciting news in today's newspaper. news是不可数名词, 又为什么可以说a good news