tag question

[Ofriendragon]

He must be the person who has been late a third time this week, __________?
A. isn’t he
B. hasn’t he
C. mustn’t he
D. must he
The anser is A

I think it is a wrong answer. It should be C, ____ it?

Could you please help me with the two blanks?

Thank you in advance.

[Alan]

Hi,

I agree with your choice. The emphasis in the sentence is on the supposed certainty indicated by 'must' and that is the verb that needs the tag: He must, mustn't he? And the other example follows the same pattern: It should be, shouldn't it?

Alan
_________________
English as a Second Language
You can read my ESL story Everything in the Garden is lovely

[Ofriendragon]

Thank you! Alan.