Ifailedagain.IfonlyI________caref

发布时间:2020-07-27 11:31:18

I failed again. If only I ________ careful enough!A.wasB.had beenC.would beD.am

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B解析导解:表示对已发生事情的遗憾,if only后的谓语动词应用had done形式.
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