题组层级快练(二十八)

　　Ⅰ.完形填空

　　Hot lava flows down a Hawaiian mountainside. Farther up the slope(斜坡), volcanologist Ken Hon picks his way slowly across the ___1___ surface. The hot lava is slippery to walk on. “It’s like walking on the ice,” Hon says. “But the bottom part of your boots starts to ___2___ a little. You’ll get burned ___3___ you fall.”

　　Hon plants his feet carefully and slowly. He’s ___4___ data on the lava flowing out of Kilauea, a volcano that has been erupting since 1983. ___5___ the lava’s movements can save lives on the slopes below. But Hon must be ___6___. New waves of lava are flowing down toward him. Every few minutes he looks up to see ___7___ the streams are and makes sure the ___8___ lava hasn’t cut off his escape route.

　　揑t抯 ___9___ out there,tt like the heat from an oven,” Hon says. “Up close, you have to wear firefighters’ gear(衣服) ___10___ the clothes you’re wearing don’t catch fire or melt.”

　　“Back in 1990, lava entered the town of Kalapana. The lava moved slowly but steadily,” Hon says. “We ___11___ evacuate (疏散) people from about 130 homes. The lava ___12___ forward and consumed all of the houses.” ___13___, everyone escaped. But today Kalapana is buried under 30 feet of lava.

　　Volcanoes aren’t ___14___ to Hon. They’re fascinating and exciting. “My ___15___ thing is to camp out at the edge of a lava lake. Sometimes I’ve had to sleep with a gas mask on.” Still, Hon knows how to keep ___16___ and knows when the lava is ___17___. “All of a sudden, it gets really bright inside your ___18___!” he says, laughing. But the ___19___ is worth it, because the more Hon and other scientists can ___20___ volcanoes, the safer they can keep the people who live around these powerful forces of nature.

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