题目

This is the first time that I _____ the summer palace．    A．had visited      B．have visited     C．visit       D．visited 答案：B 解析: 考查动词的时态。句型：This/It is the 序数词that 主+has/have done。一When did you buy this still life picture?      一It was in 1999    I traveled in Paris．   A．since    B．that    C．when D．before