Theoldcouplehavebeenmarriedfor40yearsandneveronce_______witheachother.
A、theyhadquarreledC
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。
―________finedayitistoday!
Thesetwoalarmclocksarenormallysettogether,butnowtheyhavebeenresetafewhours_________.
Thesyntacticrulesofanylanguageare______innumber.
Lyingundertheskull,thehumanbraincontainsanaverageoftenbillionnervecellscalled______.
Theothertimingsystembelongsinourinternalclocks，which，left________，wouldtiethebodytoa25-hourrhythm.
