问题
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What should be done in order to feed a large population?A.Inferior land must be cultivated
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In order to live a longer life, what should people do?A.Do as much exercise as we can.B.Gr
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What are publishers supposed to do in order to survive?A.They should sponsor the writers i
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According to the researchers, what should doctors do to treat diseases like HIV?A.Develope
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It has become necessary to develop new and better tools of market research in order to____
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In order to look younger one should cut back on f