求教OG 13 SC 012

Cecile8chen

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
解释说In (A) and (C), which
introduces a restrictive clause. Some writers
follow the convention that which can only be used
for nonrestrictive clauses, but insistence on this
rule is controversial。我不懂的是这里的意思是说一些作者认为which只能引导非限制行从句，但我们以前学的不是which可以引导从句什么的吗？

JessicaHuo

其实这道题的主要考点是时态啦

Cecile8chen

谢啦，太有爱了

nancy5130

介词+which（on/in/through...+which）是可以的，比where表达更准确

nancy5130

which只用在下列情况：
1、介词+which（介词+that是不对的，除了in that=because）
2、N，which
GMAT貌似不大喜欢which，除了介词与“，”，其他一律用that吧
比如说which与that同出现同正确时用that准确率更高

saffsa761

以前学的东西我建议你不要用在GMAT上，GMAC有它自己的rule，我们遵
从它的就OK了，毕竟它才是是出题的人。有些其他语法书上正确的point在
GMAT就是不适用。
一般GMAT偏好comma+which，我还没看到过不加comma直接用which作为正确
答案的。（如果有希望能够列出，让我也学习一下，万谢！