单选题 ______ the train had departed ______ she left the station for home．
   A．It is only then; that    B．It is only when; what
   C．It was only that; when D．If was only when; that
【正确答案】 D
【答案解析】此句是强调句，强调的是时间状语when the train had departed，所以强调句中用Ehat。