"__ you serious?" (3)
I believe the answer is:
are
(Other definitions for are that I've seen before include "live" , "(We/you/they) exist" , "Unit of land measure equal to 100 square metres" , "(They/you/we) exist" , "Exist; square measure" .)
I believe the answer is:
are
(Other definitions for are that I've seen before include "live" , "(We/you/they) exist" , "Unit of land measure equal to 100 square metres" , "(They/you/we) exist" , "Exist; square measure" .)