Question

it's cold and dull out(add a question tag)​

Answer 1

is it cold and dull outside?

Answer 2

Answer:

Isn't it?

Explanation:

The sentence reads-

it's cold and dull out ______

The question tag that will accompany this sentence will be "isn't it?".

This is because the sentence has the possessive form "it's" which will become the opposite in the question tag. Also, the question tag becomes negative for the possessive verb has a positive connotation. if any sentence has a positive form, then the question tag will become negative and vice versa. Thus, the final answer will be

It's cold and dull out, isn't it?