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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：
A和B对比 我仔细听了其他老师的回复，感觉还是没听到关键点，英吉老师说causing有问题，容易认为是前面主语发出的，其实是event发出，所以排除。。。。不太认同这个排除法，因为前面整件事导致的causing也说得通，没有任何语法错误。不会从AB中取舍
解答：
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