__________ the experiment right, I tried again and succeeded.
A．Not having doneB．Having not doneC．Not doingD．Not done
A
考查非謂語(yǔ)動(dòng)詞用法。I與do構(gòu)成主動(dòng)關(guān)系，根據(jù)句意可知沒(méi)有做到對(duì)實(shí)驗(yàn)是在我再次嘗試之前就發(fā)生的，所以使用完成式。句意：因?yàn)闆](méi)有做好實(shí)驗(yàn)，我再試了一次，成功了。
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