—Do you know that Mr. White left the party without saying a word last night?
—Perhaps because he was angry with Alan’s rude remarks.
A. why was it
B. how was it
C. how it was
D. why it was
网友回答
A. why was it
B. how was it
C. how it was
(答案→)D. why it was
解析：通过分析句子结构，可知其中包含一个宾语从句，这里表示“为什么”的意思，故用why引导宾语
从句，又因为宾语从句中要用陈述语序，故选D。