问题补充：
Most of the movies directed by Zhang Yimou historical facts.
A. is based on
B. based on
C. are based on
D. basing on
答案：
A. is based on
B. based on
(答案→)C. are based on
D. basing on
解析：be based on表示依据于某事，本题主语的关键词是most of the movies，表示的是复数概念，故be动词用are，故本题选C。
