还没有登录哦！
[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：
不是说that前面不加逗号嘛？如果把破折号看出逗号，这里的that是定语从句修饰人口瓶颈吗？可是也连不上后面的句子啊，好困惑b的结构到底是怎么回事
解答：
点赞1
阅读19291
问个问题
注册太麻烦？点这里查看免费答疑吧！
博币不足
加"GMAT小百科"小智微信
直接送200
