【题目】What was her explanation for ________ she was late on such an important occasion?
A.whichB.whyC.thatD.when
在线课程【答案】B
【解析】
考查名词性从句连接词。句意：在这么重要的场合她为什么迟到，她是怎么解释的?根据空前部分：What was her explanation for sth?可知，介词for后面缺宾语，所以，从空开始到句尾应该是for的宾语从句，且从句中缺状语，表示原因，故选B。