?Maybe it gave the alpine folks in Switzerland and Italy a bit of a head start in cultivating the highlands again,” he says. Could that be why we have Swiss milk chocolate today instead of Norwegian chocolate? “It could be.” Miller says, with a chuckle. Actually it turns out that the Swiss did invent milk chocolate a decade or two after the glaciers started to give way to more pastureland(牧场), so it’s not an entirely crazy idea.

　　But Miller sees a much bigger lesson from understanding how soot and dust could bring about quick changes to the world’s glaciers. “Things that impact the climate system in abrupt ways are the things that people should be concerned about for the future.”

　　1. According to Paragraph 2, glaciers in the Alps ________.

　　A. remained big and stable until the 1900s

　　B. disappeared early in the 1600s and 1700s

　　C. started to melt since the 1860s

　　D. were in a prolonged cold spell around 1860s

　　2. What did Painter discover about glaciers in the Alps?

　　A. Soot might have melted the glaciers.

　　B. The glaciers advanced in the Little Ice Age.

　　C. Charles Dickens described glaciers in his novels.

　　D. Glaciers melted before the industrialization.

　　3. Miller mentioned Swiss milk chocolate to prove that ________.

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