These two alarm clocks are normally set together, but now they have been reset a few hours _________.
C
but表示前后句子意思是相反的，所以前面说了settogether，后面提到的就是apart(分开)。
Hesaidthatthegroup________himaletterandaskedhimtogothereforaninterview.
Thesetwoalarmclocksarenormallysettogether,butnowtheyhavebeenresetafewhours_________.
Johnsonwas________unknownbeforerunningforthepresidency.
Countrylifeisbetterthancitylife________itoffersfreshairandnoiselessenvironment
Theothertimingsystembelongsinourinternalclocks，which，left________，wouldtiethebodytoa25-hourrhythm.