【正确答案】 C

【答案解析】[精解] 细节题。文章最后一段有这样两句："It has become one of the world's richest countries．Though Kuwait has free primary and secondary education for its people，many of them still do not know how to read and write．"其意为：科威特已经成为世界上最富裕的国家之一。尽管其为它的人民提供免费的初等教育和中等教育，但许多科威特人仍然既不会认字也不会写文章。这与[C]very rich but ill-educated(很富裕但所受教育程度低)一致。因此答案为[C]。