– When did you graduate from college?– It was in you were in middle school.A. thatB.

问题补充：

– When did you graduate from college?

– It was in you were in middle school.

A. that

B. when

C. which

D. then

答案：

A. that

(答案→)B. when

C. which

D. then

解析：考查定语从句：句意：--你什么时候从高大学毕业的？--就是在你上中学的。可知这是个定语从句，先行词是，定语从句中缺少时间状语，用when引导定语从句。选B。