Question

—Mary knows so much about .         earth!
—Yes, you know she is only .         eight-year-old girl.

A．the; a

B．an; an

C．the; an

D．an; a

Answer 1

C

试题分析：句意：---关于地球玛丽了解的是如此的多，----是的，你知道他仅仅是一个8岁的小女孩。世界上独一无二的如：地球，月亮前必须加the ,复合形容词eight-year-old中eight是元音因素开头的，用冠词 an,结合语境可知选C。