he fierce barks of Brady. Outside, heavy smoke filled the air and wind-blown flame was skipping from the top of one tree to another. The long dry summer turned the forest into a tinderbox. In a little while, Steve and Zach were inside their tent packing their belongings. Р“Let’s go! We can make it back to the river!” They headed down against the fire-wind in the direction of the river. But Brady barked a sharp warning. Ahead of them lay a thick curtain of smoke across the track. They would never make it through that. Steve was uneasy for it was hard to find a safe way to escape in the heavy smoke.РBrady lifted his head and sniffed（嗅）the smoke-laden wind. Next moment, the dog bounded away and disappeared down a sharp slope（斜坡). The boys shouted for him, but he didn’t come back. Steve couldn
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