摘要：I hope they will finish the project in time, but they themselves are very that it will. A. certain B. confident C. doubtful D. suspicious C. doubtful about/of/that...“对--疑惑的.不肯定的 , be confident“有信心的 ,be certain of/about/ that“对--确定的 ; be suspicious of/that“对有怀疑.有疑心的 .

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