【题目】My grandfather is fond of talking about the good old days, ___ is often the case with old people.
A.which
B.when
C.as
D.it

【答案】C
【解析】考查固定句型。句意：就像老年人通常的情况那样，我的祖父喜欢谈论过去的美好时光。as is often the case with...是一个固定句型（非限制性定语从句），意思是“就像/正如……情况一样”。故选C。