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问题: Which of the following sentences is wrong?

Which of the following sentences is wrong?
A.I don’t doubt that he will win.
B.I doubt whether /if he will win.
C.I doubt that he will win.
D.I have no doubt whether/if he will win.

解答:

D.I have no doubt whether/if he will win.错误

no doubt 是毫无疑问的意思 后面接的应是确定的观点,而whether/if表示不确的定的事件