---Congratulations!---Thankyou.Butforyourhelp,we________intheexperiment.A

发布时间：2020-08-07 09:42:01

---Congratulations!---Thank you. But for your help, we ________ in the experiment.A.will never succeedB.shouldn't have succeededC.couldn't have succeededD.mustn't have succeeded

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C解析句意：--祝贺你！--谢谢，没有您的帮助，我们做此试验，不可能成功。
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