问题补充:
America belongs to the country while China and India are both countries.
A. developing; developed
B. developed;developed
C. developed;developing
D. developing;developing
答案:
A. developing; developed
B. developed;developed
(答案→)C. developed;developing
D. developing;developing
解析:developing country意为:发展中国家; developed country意为:发达国家.