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外语
If powerful measures ______, this area would have been badly polluted.
If powerful measures ______, this area would have been badly polluted.
admin
2014-03-10
37
问题
If powerful measures ______, this area would have been badly polluted.
选项
A、aren’t taken
B、haven’t been taken
C、weren’t taken
D、hadn’t been taken
答案
D
解析
考查虚拟语气。由主句的时态would have been可看出,这是对过去情况的描述。且与过去事实相反,实际上过去已经采取了措施,故此处用过去完成时表示对过去的虚拟,答案为D。
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专业英语四级
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