问题补充：
Everyone knows China is getting .
A. strong and strong
B. more strong and strong
C. stronger and stronger
D. strongest and strongest
答案：
A. strong and strong
B. more strong and strong
(答案→)C. stronger and stronger
D. strongest and strongest
解析：
试题分析:此句的含义是人人都知道中国变得越来越强大，形容词的两个比较级用and连接，表示“越来越…”strong的比较级是stronger,故选c.
