Analyze the sentences about question tags and choose the le...

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Q3587396 Inglês
Analyze the sentences about question tags and choose the letter:

I- It’s a non-short question added to a statement;
II- A positive statement requires a negative question and a negative requires a positive;
III- The auxiliary verb needs be in the opposite tense from the statement;
IV- I’m, no doubt, your best friend.

Aren’t I?  
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