Sincethetimehumankin的知识精选

      Sincethetimehumankindstartedgardening,we
问题详情:      Sincethetimehumankindstartedgardening,we_____tomakeourenvironmentmorebeautiful.A.try        B.havebeentryingC.aretrying  D.willtry【回答】 B【解析】考查动词时态。根据sin...
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