1 . Cigarette smoking multiplies the r__________ (风险) of cancer. (根据中英文提示填空)
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2 . All around the world people are changing their daily habits at work and at home to reduce the r________ of being infected with the corona-virus and prevent it from spreading. （根据首字母单词拼写）
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3 . The fire spread quickly but the firefighters took all r________ to save the people trapped in the building. （根据首字母单词拼写）
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