48. What do we learn about the culture of busyness from a recent study?

　　47 Why do we tend to think that busy people are of high status?　　A) Our status can be attributed to our

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　　46 What is a reason for the author to be in the habit of saying "busy" when asked how he is doing?　　A)

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　　45 A number of existing farming technologies could be used to reduce the negative effect of climate change

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　　44 Poor people may have to give up eating certain foods because of their high prices 　　答案&解析　　44 答案

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　　43 It remains unsettled whether the global food supply problem can be solved by creating heat-tolerant crops

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