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题库 / GMATAdvanced-SC-17
The large populations and impressive cultural achievements of the Aztecs, the Mayas, and the Incas could not have come about without corn, which was not only nutritious but also was able to be dried, transported, and stored for long periods.
which was not only nutritious but also was able to be
which not only was nutritious but also could be
which was not only nutritious but also it could be
not only nutritious but it could also be
not only nutritious but also able to be
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为什么E不对呀
be able to 后面不能接被动，be able to be done错误
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