5.Which of the following is wrong?...

问题描述:

5.Which of the following is wrong?...
5.Which of the following is wrong?
A.You are without doubt mistaken.
B.There is no doubt that he is guilty.
C.We have no doubt of his ability.
D.He is no doubt the cleverest student I have ever taught.
please explain

D is wrong.
It should be corrected as:
He is no doubt the most clever student I have ever taught.