【题目】 Mary is being punished by the teacher. That is _______ she broke the school rules.
A. why B. because of
C. the reason why D. because
在线课程【答案】D
【解析】
试题分析：考查表语从句。本句考查表语从句的连接词，根据下文的she broke the school rules.可知，下文是Mary受到惩罚的原因，故选择D。句意为：老师正在惩罚Mary，那是因为她违反了学校的规章制度。