some people live in high mountains.the air up high is thin.{这是一篇阅读里的第一句话,
问题描述：
some people live in high mountains.the air up high is thin.{这是一篇阅读里的第一句话,
答
1.C 2.lungs 3.the people living in low places 4.A 5.C 6.A 绝对正确.