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2.I intended ______ the matter with you, but I had some guests then.A.discuss B. discussingC. having discussed D. to have discussed
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1.I was ______ work last week, but I changed my mind.A.to start B. to have startedC. to be starting D. to have been starting
12.The match was cancelled because most of the members ______ a match without a standard court.A. objected to having B. objected to haveC. were objected to have D. were objected to having
身份认证模型中的参与方中哪一个在一些应用场合下可以没有？
下列属于what you know的认证方式是（）。
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