Which one of the following is the appropriate question tag for the sentence, "Take a seat, _____”?

Which one of the following is the appropriate question tag for the sentence,

It's very hot today, 

Which one of the following is the appropriate question tag in the sentence,

The collector (a)/visits the office regularly (b)/Isn't it? (c)/No error (d)

Use the correct form of the verb given in brackets.

You _____ (see) him, did you?

Which one of the following is the appropriate question tag in the sentence?

She has not completed (a)/her course, (b)/isn't it? (c)/ No error (d)

You like him, _____

The appropriate question tag to be used to complete the given sentence is:

Kishore will come,

We must hurry,