There are always interesting stories in the series that many people watch them.Aso so

问题补充：

There are always interesting stories in the series that many people watch them.

Aso, so

B. such, such

C. such, so

D. so, such

答案：

A. so, so

B. such, such

(答案→)C. such, so

D. so, such

解析：such是形容词，修饰名词，意思是如此的这样的；so是副词，修饰动词，意思是如此这样。句意：这个系列中总是有如此有趣儿的故事，以至于许多人看。结合语境可知前文用副词such修饰interesting stories，下文用副词修饰形容词many，故选C。