I have no doubt______ Bob will work out all the math problem

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I have no doubt______ Bob will work out all the math problems.
I have no doubt_____ Bob will work out all the math problems.
Awhether Bthat

B
如果是有疑问,就是whether
这里是没有疑问,显然后面是陈述句
再问：怎么区别有没有疑问（我可不可以理解Bob是否做出数学题）
再答： doubt是有疑问，have no doubt是毫无疑问，说明后面是陈述句，鲍勃肯定会怎么样，用that 如果是have doubt,那么，就是我怀疑他是否怎么样,宾语从句或者是间接引语里，一般疑问句用if whether引导

I have no doubt______ Bob will work out all the math problem they have no problems ___ out the math problem. I try( )work out the math problem by myself I found()impossble for()to work out the math problem I have __________(困难) working out the math problem. ---Is this math problem difficult? ---No, I can work it out All of us found______diffcult to work out the math problem.为一道英语填空All of us found difficult to work out the math problem I have difficulty( )(work)out the mach problem -I can it work out the math problem.What should I do?-You sh 1.The math problem is so difficult that I can't work it out. I suppose that you can work out the math problem.改为否定怎么改