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阅读“七选五”训练 根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。 In earliest times, men considered lightning to be one of the great mysteries of nature. 36 In reality, lightning is a flow of electricity formed high above the earth. A single flash of lightning 1.6 kilometers long has enough electricity to light one million light bulbs. The American scientist and statesman, Benjamin Franklin, was the first to show the connection between electricity and lightning in 1752. 37 This device (装置物) protects buildings from being damaged by lightning.A flash of lightning between a cloud and the earth may be as long as 13 kilometers, and travel at a speed of 30 million meters per second. 39 Lightning hits the Empire State Building in New York City 30 to 48 times a year. In the United States alone it kills an average of one person every day. The safest place to be in case of an electrical storm is in a closed car. Outside, one should go to low ground and not get under tress. 40 Inside a house, people should avoid open doorways and windows and not touch wires or metal things. A. Do not be afraid of lightning. B. With lightning, it is better to be safe than sorry? | 
