___________your twin brother’s name Nick? – Yes, ________ is. 

—I don't think we have met before，________？—Yes，once at a party，but we weren't introduced.

-- ____     have you lived in this beautiful city?    -- For six years.

—______ drive after drinking. It’s too dangerous(危险的).—OK. I won’t. 

I told you the other day that Tom had agreed with your idea, ________?