"Do you, "A.B.", declare that as far as you know there is no lawful impediment to your proposed marriage with "C.D." here present, and that you call all here present to witness that you take "C.D." as your lawful wife "(or husband)"?" and thereupon the parties shall give each other the right hand and the marriage officer concerned shall declare the marriage solemnized in the following words: "I declare that A B and C D here present have been lawfully married.