英语短文改错…在线急等…只要速度…

It's important of （of --- for） us to keep good eyesight. But do you know what (what --- how) to protect your eyesight ? First , don't keep your eyes working long . You'd better have a rest ( 加 by) looking in the kong （kong --- long） distance before (before --- after) You've (You've --- you've) studied ( 加 for) an hour or so . Second , pay attention to

It's important for us to keep good eyesight , but do you know HOW to protect your eyesight?firstly, after you've studies

重要的是我们保持良好的视力。但是，你知道什么来保护您的视力？首先，不要让你的眼睛长时间工作。你最好有休息寻找在香港的距离，然后再研究过一小时左右。其次，要注意

把It's important of中的of改成for
把 have a rest 前加to、look原形
把 know what to protect your eyesight ? 中what改成how、