分类：教育/科学-外语学习
问题：英语试题Hedidnotexplain_________whyh 
He did not elain    _________  why he  was late ,which made us unhappy .A of us B us C for us D to us
回答：explain for sb.替某人解释
explain to sb.给某人解释
explain of sth 什么的解释

所以 D
对吗？