The other timing system belongs in our internal clocks，which，left ________，would tie the body to a 25-hour rhythm.
A、behindB
译文：更不用说，另一个定时系统在我们的人体时钟内，它会使人保持在一个25小时的生理节奏上。此题考查关于leave的短语。leavebehind意为“留下，放弃”，leavealone意为“更不用说”。leaveout意为“遗漏，忽视”。
Theothertimingsystembelongsinourinternalclocks，which，left________，wouldtiethebodytoa25-hourrhythm.
Iaskedhimto________meafewminutessothatwecouldgooveralltheproblems.
_______forthefreeticket,Iwouldnothavegonetoseefilmsooften.
Thesetwoalarmclocksarenormallysettogether,butnowtheyhavebeenresetafewhours_________.
Thisisanimportantproblem_______toofewsocialscientistshaveresearched.
