Although it was not named ________ 1782, this kind of metal was used as early as 5300 BC.A.in B.for C.until D.since
— Wasn't it Dr Wang who spoke to you just now? — ____.
— I wonder if I could use your mobile phone. — ____.
— Why didn't you go to the cinema yesterday? — I ____, but my wife returned from France the moment I was leaving.
— I'd rather have some wine, if you don't mind. — ____.
— Hello, may I have an appointment with the doctor? — ____