More and more Americans are going to wor
题型：完形填空
问题：
More and more Americans are going to work by bike. Do you know why more people are 41 bikes to work? We can answer the question in 42 ways. First, bikes don’t need gasoline (汽油), so it takes 43 money to use them. Second, a bike doesn’t 44 much space (空间), so it is 45 to find a place for it. And riding a bike is good for one’s 46 . People often drive their 47 to offices or to shops, but now people think riding bikes is a good way of doing sports. That’s 48 more Americans are now riding to work 49 bike, and they are 50 their own cars at home.
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