单选题 I came late to class today; the reason being that the bus broke down.
A．today, and the reason being that B．today, for the reason being that
C．today because D．today; due to

【正确答案】 C
【答案解析】[解析] 结构应用
本句意为：我今天上课迟到了，因为公共汽车坏了。应是主句十原因状语从句；但选项 A、B、D都不是原因状语从句，因此只有C正确。