.It was in the 1990s we were working together we made friends with each other.
A. that; when
B. when; that
C. that; that
D. when; when
网友回答
A. that; when
(答案→)B. when; that
C. that; that
D. when; when
解析：考查含有定语从句的强调句型。第一空是定语从句，先行词为the 1990s，从句中缺少时间状语，所以用when，第二空，用that 为强调句型的标志，句意:就是在二十世纪九十年代我们一起工作的时候我们互相交了朋友。所以选B。