If powerful measures ______, this area would have been badly polluted.A、aren’t t

游客2023-11-08 60

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。

转载请注明原文地址:https://tihaiku.com/zcyy/3169332.html

相关试题推荐

随机试题

最新回复(0)

Theytook______measurestopreventpoisonousgasesfromescaping.A、fruitfulB、be