①—Who is the girl our teacher is talking with?

①—Who is the girl our teacher is talking with?
— I don't know.I _____ her before.
A.had never seen B.am never about to see C.was never seeing D.never saw
②Last Saturday,ther arrived at the farm ______ they had never paid a visit before.
A.where B.to which C.which D.for which
③The old king cried loudly for help,expecting someone ______.
A.to come to his defence B.coming to his defence C.to come for his defence
D.coming for his denfence
④It is reported that the top leaders of the two countries held talks in a ________ atmosphere.
A.relax B.relaxing C.relaxed
⑤—Would you like to go swimming tomorrow afternoon?
—I'd like to,but I _____ to Jane's birthdahady party.
A.am invited B.was invited C.will be invited D.have been invited
⑥The old man had been living in the countrysude and moved to the city to live with his son until quite ______.
A.immediately B.equally C.recently D.freely