Was it through Mary was working at a high school you got to know Tom?
A. who; who
B. that; which
C. who; that
D. who; which
网友回答
A. who; who
B. that; which
(答案→)C. who; that
D. who; which
解析：考查定语从句和强调句型。本题第一空是定语从句，先行词是Mary，关系代词who指代先行词在句中做主语。第二空中的that与it was构成强调句型。句意：正是通过在高中读书的Mary，你才认识Tom的吗？第一空可以使用that/who，但是为了避免和后面的that重复，所以使用了who。故C正确。