试题题干
Translate the following sentence into Chinese.
One explanation for this behavior is that, although the postman comes to the house often, he never enters the house.
参考答案
试题解析
考点：explanation解释；behavior行为； postman邮递员；enter the house进入房间。
句子结构：句子主干为One explanation is that，although为让步状语从句。