首字母填空，使短文意思通顺、语法正确.每空一词。

     Today, I read an article on the website of the Get Fit Club. Now I do not think it is   d__1__ to live

up to 100 y_  2__ old. S __3__ snacks can give us e _4__, but they are not h__5__ .I should not eat

so many sweet s__6__. Every day, I should e__7__ for 30 minutes. It can make m__8__ stronger. I

must c__9__ my diet and lifestyle from now on. I know I should not play c_10__ games or chat with

friends on the Internet for a long time every day.

层燃炉的二次风作用在于补充燃烧需要的空气。