【改错】Small as it is,but it is very beautiful.为什么去掉but?

题目

【改错】Small as it is,but it is very beautiful.为什么去掉but?
In my hometown there are blue sky,fresh air,sweet water and kind people.为什么are改为is?

答案

Small as it is = As it is small 尽管它很小这是一个as引导的让步状语从句,其后的but it is very beautiful为主句.此处的as = although,意思是“尽管,虽然,即使”.而这个主从复合句当然只能有一个连词,用了as就不能...