书上说是定语从句.it在不知道是谁的情况下可以表示人,然后that就是连接词
问题描述：
书上说是定语从句.it在不知道是谁的情况下可以表示人,然后that就是连接词
答
还是Who is it that won the first prize in the later National Maths Competation?这句话吧.再分析一下：1.Who is it ?为主句,that won the first prize in the later National Maths Competation为that引导的定语...