根据句意和首字母提示，完成短文。

    My school is on Zhongyang S____. It is only about half an h____ on foot from my home. And if I r____ there, it takes l____than ten minutes. Every morning, I go along Zhongshan Road by bike and take the second turning on the left. It's not f____, so I don't have to get up too e____. Sometimes when it rains, I take a bus to school. I get off at the bus s____. It's just n____ to our school gate.

    It's good to live near the school. But there is a p____. There is usually too much t raffic in the afternoon. And I hate w____ for a long time on my way home.

已知等比数列{a_n}，若a₁+a₂=20，a₃+a₄=80，则a₅+a₆等于（　　）

地窖中的红薯储藏久了会空心，这是什么原因造成的（　　）