问题
选择题
.Was it through Mary , ____ was working at a high school , _____ you get to know Tom ?
A．who, who
B．that, which
C．who, that
D．who, which
答案
C，
在此句中Was it…that…也的确是强调句型，但句中的两个逗号不在强调句型中，它的作用是把非限制性定语从句who was working at a high school与句子其它部分分隔开来。整句话的汉语意思是：玛丽在一所中学工作，你是不是通过她认识汤姆的？