is often the case with elder people my grandma talked about my new hairstyle for at leas

问题补充：

is often the case with elder people, my grandma talked about my new hairstyle for at least 50 minutes nonstop.

A. That

B. Which

C. As

D. It

答案：

A. That

B. Which

(答案→)C. As

D. It

解析： 定语从句考查题，as作为关系词指代整个主句的意思；Which虽然可以指代整个主句的意思但不能位于句首。奶奶至少五十分钟不停地谈论我的新发型这是老年人常有的事。 选C