Question

【题目】Although he talked half an hour, he couldn't give us a good （explain）of the reason why he did it.

Answer 1

【答案】explanation
【解析】句意：他谈了半个小时，但就为什么他做那件事仍未能给出一个合理的解释。explanation名词，“解释”；give an explanation固定短语“做出解释”，故填explanation。