【题目】This is ________ book I borrowed yesterday. Isn't it ________ interesting one?
A.the; the
B.the; a
C.a; the
D.the; an

【答案】D
【解析】句意：这是我昨天借的那本书。是不是很有趣？第一个空是特指昨天借的那本书，用the；第二空表示一本有趣的书，interesting开头是元音音素，要用an，故选D。