WhenIcamethroughthecustomsattheairport,Ihadtopay________onaclockIhadbought.
A、taxesWhenworkersareorganizedintradeunions,employersfindithardtolaythem________.
________fromtheoccasionallatenightparty,ourneighborsareveryquiet.
Theoppositionleaders________thegovernmentfornottakingactionsooner.
Each year in the United States, many black teenagers _______ of school, either because they cannot keep up or they have to work to support their family.
The boy ran out of the classroom without the teacher's _______.
