2. 外语
  3. These investigations______(本来可以证明) all his initial suspicion if he had insisted.

These investigations______(本来可以证明) all his initial suspicion if he had insisted.

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问题 These investigations______(本来可以证明) all his initial suspicion if he had insisted.
选项
答案would have eonfirmed
解析 if he had insisted表明从句是虚拟语气，从句中如果使用了过去完成时，那么主句一般用would have done表示。
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大学英语四级

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