寻求高中英语完形填空的答案

寻求高中英语完形填空的答案On a Saturday afternoon,a friend and I were throwing stones onto the roof of an old lady's house.Our game was to＿how the stones changed to missiles as they rolled to the roof's edge and shot out into the yard like stars falling from the＿.这是第一段 后面的就不打了 就拜托你们了!要尽快啊!