来自杜利明的问题
【______Iwastalkingtomyfriends,myprofessorcameintotheroom.A.OnceB.AslongasC.DuringD.While】
______Iwastalkingtomyfriends,myprofessorcameintotheroom.
A.OnceB.AslongasC.DuringD.While


【______Iwastalkingtomyfriends,myprofessorcameintotheroom.A.OnceB.AslongasC.DuringD.While】
______Iwastalkingtomyfriends,myprofessorcameintotheroom.
A.OnceB.AslongasC.DuringD.While
while,while.doing,sthhappened这是个固定搭配