新概念英语第二册53课摘要写作

问题描述

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Now that firemen have put out a big forest fire in California, they have been trying to discover its cause. There was no evidence that it was started by broken glass or a cigarette end. However a fireman has just solved the mystery. He noticed the remains of a snake which had been dropped by a bird on to some electric wires. In winding itself round the wires, the snake had sent sparks to the ground and this caused the fire.