This is ____ interesting book and it is also _____

试题详情及答案解析

This is ____ interesting book and it is also ______ useful one.

A．a; a

B．an; an

C．an; a

D．an, the

答案：C

试题分析：句意：这是一本有趣的书并且它也非常有用。Interesting是以元音音素开头的，故用an，useful是以辅音音素开头的单词，故用a；根据句意，故选C。
考点：考查冠词。