2. 外语
  3. If oil______on the frozen north coast in the 1960’s, an 800-mile pipeline would not have been constructed to bring it to the sou

If oil______on the frozen north coast in the 1960’s, an 800-mile pipeline would not have been constructed to bring it to the sou

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问题 If oil______on the frozen north coast in the 1960’s, an 800-mile pipeline would not have been constructed to bring it to the south coast.
选项 A、was not discovered
B、was discovered
C、had not been discovered
D、had been discovered
答案C
解析 本题考查虚拟语气，是与过去事实相反(主句用了should／would have+过去分词)，从句要用过去完成时。题意为，如果在20世纪的60年代没有在北部冰封的海岸发现石油，把它运到南部海岸的800英里的输油管本来是没有必要修建的。
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