Maria has written two novels, both of have been made into television series.
A. them
B. that
C. which
D. what
网友回答
A. them
B. that
(答案→)C. which
D. what
解析：考查定语从句：句意：Marie已经写了两本小说，两个都被拍成电视剧。先行词是two novels，因为先行词是物，所以定语从句由both+of+which引导，介词后面不能用that，what不能引导定语从句，选C。