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单项选择题What Cause's the soup can to swell

单项选择题The tone of the passage is______.

单项选择题Which of the following countries lags behind the United States by the largest margin

单项选择题This article is mostly likely taken out of______.

单项选择题A family with 2 adults and '2 children and with clothes washer and dishwasher should purchase a water heater with a capacity of ______ gallon.