It was seven o;clock in the morning he came back.It was really at seven o’clock he came

问题补充：

It was seven o;clock in the morning he came back.It was really at seven o’clock he came back from work this morning.

A. that; that

B. when;when

C. when; that

D. that;when

答案：

A. that; that

B. when;when

(答案→)C. when; that

D. that;when

解析：本句的第一空用where引导时间状语从句子，而第二空用that构成一个强调句型。