问题
选择题
Was it on that morning ________ you left for Beijing ______ he discovered our secret?
A．that; where
B．which; that
C．when; that
D．that; when
答案
答案：C
本题考查强调句型和定语从句。When you left for Beijing是定语从句修饰前面的that morning; you是 句子的主语，谓语动词：left for;宾语：Beijing.句子是完整的，应该选择关系副词。第二空的that与it was 是强调句型的基本结构。