题目内容：

The news that he failed in the exam _____________ his unhappiness this morning.
A.accounted for B.accounting for C.had accounted for D.to account for
为什么选A

优质解答

account for 作为句子的谓语,所以B和D不能选,否则缺少谓语动词,C选项是指这个消息对他后来还有影响,而句子中则是说“一个上午”