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题库 / Prep2007E2-SC-47
Those skeptical of the extent of global warming argue that short-term temperature data are an inadequate means of predicting long-term trends and point out that the scientific community remains divided on whether significant warming will occur and what impact will it have if it does.
on whether significant warming will occur and what impact will it have if it does
on whether warming that occurs will be significant and the impact it would have
as to whether significant warming will occur or the impact it would have if it did
over whether there will be significant warming or the impact it will have
over whether significant warming will occur and what impact it would have
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请问这个题正确答案中whether部分不虚拟，what impact部分虚拟是怎么回事。
我做的时候也在AE中纠结了下， A有语序的问题 what will it have 是不对的，就算不虚拟也是what it will have; 另外E中and连接的是两个连续的事情——A是否发生，以及如果A发生了影响会如何； 但A并没有发生，所以后一个是虚拟的
whether significant warming will occur and what impact it would have
whether不虚拟，是因为它后面的内容是“这件事是否发生，而what后的内容是”影响是什么“
是否的问题不存在虚拟，发生什么这类具体事件才需要虚拟
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