题目

(B)阅读短文，回答问题。Reading is a good hobby for all kinds of reasons.First, reading is fun. You can always keep yourself happy if you like reading. You will never feel bored or tired.Next, you can read a book anywhere--- in a car, on a plane, or even in the bathroom. All you need is a book!Another good reason for reading is that it is useful. If you read as a hobby, you will get better and better at it. And you will read faster and find it easier to understand what you read. As your reading skills improve, you will probably find your schoolwork becomes much better.Some people say 下列变化中，只发生了物理变化的是（　　）A. 植物光合作用B. 苹果腐烂变质C. 矿石研磨成粉D. 酸雨腐蚀建筑