Thismedicine has proved ________ (有益的) to mankind, because it has saved millions-组卷网

单词拼写-根据汉语意思填空较难0.4 引用1 组卷14

This medicine has proved ________ (有益的) to mankind, because it has saved millions of people’s lives.

19-20高二下·江苏徐州·阶段练习

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