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For instance, highway overpasses had to be high enough to allow trailers carrying military missiles to pass under them.
2018年6月四级真题（第二套）听力 Section C
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In those years, just after World War I, the military wanted to build an American highway system for national defense.
2018年6月四级真题（第二套）听力 Section C
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the 20th century a highway, car, truck century—and the 21st century will increasingly be an aviation century, as the globe becomes increasingly connected by air, " Kasarda says.
2019年12月四级真题（第一套）阅读 Section B
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The company spent the last five years developing solar panels that are only about a quarter of an inch thick and are strong enough to stand up to heavy highway traffic without breaking or making the roads more slippery.
2017年12月四级真题（第二套）听力 Section A
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The United States has one of the best highway systems in the world.
2018年6月四级真题（第二套）听力 Section C