He was admitted to our school two years ago a top school in our hometown he has been cr

问题补充：

He was admitted to our school two years ago, a top school in our hometown, he has been crazy about reading electronic novels, killing time.

A. after that

B. since that

C. after when

D. since when

答案：

A. after that

B. since that

C. after when

(答案→)D. since when

解析：句意：两年前，他被我们学校—镇上的重点学校录取，自从那时，他就痴迷于阅读电子小说，消磨时光。这里使用定语从句，先行词是two years ago，因为两句话没有连词，所以判断是定语从句，用介词since+when引导定语从句，所以选D。