问题描述：
To sleep at least eight hours every day is very necessary for the students 同义句改写2种
it's very —— —— the students —— —— at least eight hours every day
it's very —— —— the students —— at least eight hours every day
it's very —— —— the students —— —— at least eight hours every day
it's very —— —— the students —— at least eight hours every day
问题解答：
我来补答展开全文阅读