Question

5. —Is that interesting book?

—Yes,but it is difficult.

   A. an;a little

   B. an;a few

   C. a;little

   D. a;a little of

Answer 1

5. A

5. A 解析:interesting是以元音音素开头的单词，故此处用不定冠词an; a little “一点儿”，可以修饰形容词或副词。