问题补充：
book of this writer is East and West.
A. Known to be the best
B. It was the best known
C. Known as the best
D. The best known
答案：
A. Known to be the best
B. It was the best known
C. Known as the best
(答案→)D. The best known
解析：主要测试形容词。由句子的语境可知book需要定语来修饰。译文：这位作家最好的书是【东和西】。
