【题目】He finished writing his first novel last year, and we all think that is ______ his career really took off.
A. whereB. when
C. howD. why
在线课程【答案】B
【解析】
考查连词副词。句意：他去年完成了他的第一部小说，我们都认为那是他事业真正起飞的时候。分析句子可知，and后的句子为表语从句，空处缺少连接副词，根据“He finished writing his first novel last year,”可知，空处应该选择连接副词when。故B选项正确。