参考答案

正确答案：D
解析：题目问为什么男孩子老往玻璃房扔石头。从短文中可以听到“Mr. Flowers' glasshouse was close to a public path，which was always used by children walking to and from school．Boys were often attracted to throw a stone or two at his glasshouse”，由于玻璃房在路边，放学后孩子往往驻足观看并往里面扔石头。可见学生扔石头完全是因为顽皮，并没有提到A) 、B) 、C) 中的这些原因。