Every means has been . No one is effective.A.tried forB.tried onC.tried inD.tried out

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编辑：chaxungu时间：2026-04-24 12:51:09分类：高中英语题库

--Every means has been ______.

--No one is effective.

A.tried forB.tried onC.tried inD.tried out在线课程D
解析：
无A、C两项表达法。try on表示“试穿”，而此处表示“试验某物来检验其功能、效果等”，用try out。