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[Sentence Correction]
试题详情
题目：
Some anthropologists believe that the genetic homogeneity evident in the world's people is the result of a "population bottleneck"—at some time in the past our ancestors suffered an event, greatly reducing their numbers and thus our genetic variation.
选项:
A、at some time in the past our ancestors suffered an event, greatly reducing their numbers
B、that at some time in the past our ancestors suffered an event that greatly reduced their numbers
C、that some time in the past our ancestors suffered an event so that their numbers were greatly reduced,
D、some time in the past our ancestors suffered an event from which their numbers were greatly reduced
E、some time in the past, that our ancestors suffered an event so as to reduce their numbers greatly,
答案:
B
提问：
转唐塘老师回答
请问老师可以把从拿到这道题怎么下手读、考虑精准性和每个选项筛选过程详细解释一遍吗？破折号后面不能跟完整句吗？
我在B和D中犹豫最后选了D，感觉两个差不多，that…that我不确定这样的结构，但from which感觉可能更具有指向型表某事造成了什么
解答：
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