i'm not sure that will pass the exam tomorrow 为什么不能说passes 不

I 'm sure ___ the exam. A. to pass B.pass C.passing D.passes I'm not sure--------he will come tomorrow.中间为什么不能用whether来连接 Ron will pass his exam ,I'm sure . I think you will ______ (sure) pass the exam. he is sure that he will pass the exam.同义句he is sure ___ ___ I'm sure you pass the driving test tomorrow. I'm not sure if you will succeed in the exam.的句子成分 I believe that he will pass the exam.同义句 Will it be fine tomorrow?I'm not sure ,____ I am sure I will pass the exam.我确信我会通过考试. I am sure I will pass the exam.,这也是宾语从句? ---i'm sure Tom will pass the final examination