—I find it very difficult to read novel you lent me last week.—Yes.It's necessary to hav

—I find it very difficult to read novel you lent me last week.
—Yes.It's necessary to have good knowledge of history.
A. the；/
B. a；/
C. the；a
D. a；a

A. the；/B. a；/(答案→)C. the；aD. a；a解析：第一空特指对方上周所借给“我”的小说，故应填定冠词；但考生可能以为第二空后面是抽象名词，为不可数名词，不填冠词，于是错选A。然而，此处knowledge之前应用不定冠词，have a good knowledge of意为“对……很了解”，是固定搭配，故正确答案为C。

这个解释是对的