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A professor reported that he____________(已发现一种新方法帮助老人) improve their memories.
A professor reported that he____________(已发现一种新方法帮助老人) improve their memories.
admin
2010-07-24
68
问题
A professor reported that he____________(已发现一种新方法帮助老人) improve their memories.
选项
答案
A professor reported that he had discovered a method to help the old improve their memories.
解析
因discovered发生在reported之前,所以在report引导的宾语从句中谓语动词需用过去完成时态,即had discovered表达。
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0
大学英语四级
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