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[Sentence Correction]
试题详情
题目：
Though the law will require emissions testing of all diesel vehicles, from
tractor trailers to excursion buses, it will have no effect on sport utility
vehicles, almost all of which are gasoline powered, and will not be sub-
jected to emissions-control standards as stringent as they are for
diesel-powered vehicles.
选项:
A、powered, and will not be subjected to emissions-control standards as stringent as they are for
B、powered, and therefore not subjected to emissions-control standards that are as stringent as those of
C、powered and therefore not subject to emissions-control standards as stringent as those for
D、powered, which are not subject to emissions-control standards as stringent as they are for
E、powered and therefore they are not subject to emissions-control standards as stringent as those of
答案:
C
提问：
E，想请问下E中是否是they多余？原因是因为前面为划线部分说了all of which, which已经指代了sport utility vehicles，and后面主语一样再加they就重复了？另外还有一个问题想请老师明确一下，是不是因为be subject to本身就是受制于所以就不能再用被动了，我根据这一点排除了A和B。另外关于最后的of 和 for，因为是跟在standards后面的所以从语义角度 对vehicles的标注比 vehicles的标准好选for。想请老师确认一下谢谢！
解答：
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提问：
请谈下B/C的区分
解答：
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