The cave had not the entrance been spotted by French pot-holer, Berger.
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The cave ________(也许永远不会为人所知)had not the entrance been spotted by French pot-holer, Berger.(discover)
试题答案
答案:might never have been discovered
解析:考查情态动词的用法。might have done sth意为“可能做了某事”。 |