The solution to the world’s food problems depends on ______. The tone of the story shows the author believes the problem is ___

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问题 The solution to the world’s food problems depends on ______.
The tone of the story shows the author believes the problem is ______.

选项 A、difficult to solve, perhaps impossible
B、difficult to solve but not impossible
C、impossible to solve
D、beyond the question

答案A

解析 见原文最后一句:看似明显的解决方法可能很难,甚至不可能实现。
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