求问gmat中has been doing对还是错啊？ og 12 sc10中说错呢!

cookiezwy

Carnivorous mammals can endure what would otherwise be lethal levels of body heat because they have a heat-exchange network which kept the brain from getting too hot.
(A) which kept (B) that keeps (C) which has kept (D) that has been keeping (E) having kept



D. Has been keeping is the wrong tense

victor198506

因为在这句句子中不需要用完成进行时

rylstar01

1）同意楼上victor说的，句中没有提示现在完成时的时间词。
2）而且Carnivorous mammals 的这种现象，应该算是一个自然规律吧，用一般现在时比较好。

cookiezwy

嗯嗯！知道了谢谢大家~