B
如果是有疑问,就是whether
这里是没有疑问,显然后面是陈述句怎么区别有没有疑问（我可不可以理解Bob是否做出数学题）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 problems.
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
I have no doubt_____ Bob will work out all the math problems.
Awhether Bthat
英语人气：675 ℃时间：2020-02-15 10:08:15
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