The website is very popular. And it’s amazing that designer of it is just nine-year-old

问题补充：

The website is very popular. And it’s amazing that designer of it is just nine-year-old child.

A. the; the

B. a; the

C. the; a

D. a; a

答案：

A. the; the

B. a; the

(答案→)C. the; a

D. a; a

解析：考查冠词。第一空用定冠词the，特指“网站的设计”；第二空用不定冠词a，表示“一个9岁的孩子”。句意：这个网站非常受欢迎，其网站设计是一个9岁的孩子令人很惊讶。故C正确。