Question

【题目】Underground is the only word in the English language ___ begins and ends with the letters “und”.

A. what B. that C. who

Answer 1

【答案】B

【解析】

句意：underground（地铁）是英语中唯一一个以und开始又以und结尾的单词。what不能引导定语从句；who指人，that指物或人，本句的先行词是the only word，指物，关系词在从句中作主语，要用that来引导，故答案为B。