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8.It has been proved that people have benefited from aspirin and penicillin since they were invented.
Aspirin and penicillin have provedbeneficialto people since they were invented.

分析 已经证明,自它们被发明以来,人们就受益于阿司匹林和青霉素.

解答 答案是beneficial to.句意是"已经证明,自它们被发明以来,人们就受益于阿司匹林和青霉素."题干中的benefited from是说Aspirin and penicillin是对人类有益的,可以用词组beneficial to来表示.故答案是beneficial to.

点评 解答此类题目,首先需要明确句意,然后根据相关语法对句子表达进行转换.

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