Theoldcouplehavebeenmarriedfor40yearsandneveronce_______witheachother.
C
本题考查的是倒装结构的用法。第二分句中因有否定副词 never 提前，故应用倒装结构;第一分句中的 have been married 已限定了时态，据此可排除 D 项。
Ifyouarewalkingawayfromaclocktower，youwillhearthetickingoftheclockfadetoapoint________itcannotbeheard.
Ifpaymentisnotreceived,legalactionwillbeouronly________.
He said that the group ________ him a letter and asked him to go there for an interview.