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急请教高手 补充材料厂12-04 05
Just as plant species native to regions with browsing mammals evolved many natural anti-browser defenses, so humans in malarial regions have evolved dozens of chemical defenses against malaria.
B humans in malarial regions have been evolving dozens of chemical defenses against malaria
A是什么用法, B为什么不对
The record of the past is always incomplete, and the historian who writes about it inevitably reflects the preoccupations of their own time.
D writing about it, it is inevitable for historians to relect E historians in writing about it inevitable reflect
D 为什么不如E, in writing 是定语么
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