Thesetwoalarmclocksarenormallysettogether,butnowtheyhavebeenresetafewhours_________.
A、awayC
but 表示前后句子意思是相反的，所以前面说了 set together，后面提到的就是 apart(分开)。
Thesyntacticrulesofanylanguageare______innumber.
Ifyouarewalkingawayfromaclocktower，youwillhearthetickingoftheclockfadetoapoint________itcannotbeheard.
Theothertimingsystembelongsinourinternalclocks，which，left________，wouldtiethebodytoa25-hourrhythm.
Iaskedhimto________meafewminutessothatwecouldgooveralltheproblems.
Lyingundertheskull,thehumanbraincontainsanaverageoftenbillionnervecellscalled______.
