Nowadays, volcanoes are getting more and more unpredictable. There have been many changes in sea level caused by global warming and melting ice caps. These have resulted in some dormant volcanoes erupting, so studying them is more dangerous than ever before. Hazel says that although she doesn't take any unnecessary risk, she has had some frightening moments. Her worst experience was on the slopes of Mount Etna in Sicily, when she was slowly surrounded by lava. “I had a choice of walking ten hours to get around the lava flow or just walking across it，” she explains. She chose to pick a path across the cooler rocks in the lava stream. “I guess it was five metres. The flow was 1，000°C, so if you hesitated, your boots would begin to melt. It was scary, but it really was a practical decision—there wasn't time to do anything else.”

　　And what about the future? “I haven't been to the volcanoes in Indonesia yet. And I would love to spend some time working in the Antarctic，” she says. “I would also like to know why quiet lava flows erupt from some volcanoes and why other volcanoes go bang.” In other words, Hazel Rymer won't be exchanging her volcanoes for the relative safety of driving to work just yet.

　　1. Hazel's claim that 揹riving to work is more risky?than exploring volcanoes shows that t.________．A．people have exaggerated the dangers of volcanoes in the past

　　B．Hazel does not really understand the dangerous situations she puts herself in

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