it;s still cold on the early spring.为什么用“on”?

it;s still cold on the early spring.为什么用“on”? It's still cold,but it gets 什么and 什么 It's ( t )cold today .please put on your warm coat . It`s cold today,isn`t? --It's so cold!Why are your windows still open?--Oh,they____.A.aren't close B.won't close C.won't be closed It's very cold today,isn't it? It’s cold today,isn't it?什么意思 Tom doesn’t like the soupbecause it's cold.(because it's cold.划线提问） It's cold outside,I shouldn't __ my coatA put out B put on C put awayD put off Is it cold on It's cold outside,please put on your coat.翻译 ( )(put) on your coat.it's cold outside It's cold today.Put on your coat.的中文 it‘s cold outside.you must pur on w_____clothes. It's cold outside .You must put on w--- clothhes It's cold today ; put on your g_____ ,please. Its cold outside put on your sweater It's cold,you'd better put on the s_____