this is 改成 it is.通常用it 指代天气.
如,It is very warm in Hainan in winter.
It was quite windy yesterday.
(During )(the) holiday,(we) always have (good) time.（括号里的改错）
good 改成 a good.
have a good time,玩得很开心,过得很愉快 (Everything )(in) the room( are)( for) you.(括号里面的改错）are 改成is