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In an attempt to find out how different creatures see the world, psychologists a
In an attempt to find out how different creatures see the world, psychologists a
游客
2023-12-01
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问题
In an attempt to find out how different creatures see the world, psychologists at Brown University in the U. S. had been comparing the behavior of birds and humans.
选项
答案
时态错误,应把had been comparing改为have been comparing。
解析
此句没有明显的表示过去完成时的标志性时间状语,因此使用现在完成进行时即可。
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