Thisisanimportantproblem_______toofewsocialscientistshaveresearched.
Thenoiseofthepartystoppedmegetting________________sleep.
Ifyouarewalkingawayfromaclocktower，youwillhearthetickingoftheclockfadetoapoint________itcannotbeheard.
Fromthesociolinguisticperspective,aspeechvarietyisnomorethanadialectalvarietyofalanguage.
Iaskedhimto________meafewminutessothatwecouldgooveralltheproblems.
