OG11 SC#7

asupls

请问，如果OG 11 SC #7（如下）有这样一个选项“, which keeps”是不是也是错误的。因为这里必须要一个限制型定语从句来解释heat-exchange network不然理由就不够strong了？

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

谢谢

xizzhu

yes

xizzhu

以下是引用asupls在2006-12-11 0:24:00的发言：

请问，如果OG 11 SC #7（如下）有这样一个选项“, which keeps”是不是也是错误的。no, it's correct but that keeps is better.  因为这里必须要一个限制型定语从句来解释heat-exchange network不然理由就不够strong了？i don't think so.
            

The sentence without 定语从句-Carnivorous mammals can endure what would otherwise be lethal levels of body heat because they have a heat-exchange network -
                    is still correct.

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

谢谢

asupls

谢谢拉