options: f : i agree . the government should really do something to prevent forest fires . f : forest fires have been successfully controlled over the few years . f : i 'm glad to know that human activities are in control now . f : most forest fires are caused by natural mysteries waiting for us to figure out .
article: f : every year , there are a large number of forest fires and the causes are not mysterious . m : yeah , most of them are caused by human activities , like people throwing away burning cigarettes .