Weregretto________thatitmaynotbepossibletodealwitheveryrequest.
A、putoffWhenworkersareorganizedintradeunions,employersfindithardtolaythem________.
Insomeschoolschildrenwhoprefertoreadbooksratherthan________footballbecomesocialoutcasts(被抛弃者).
SinceWilliamhadbeenseriouslyillforseveralmonths,hisparentswereworriedabout________toreturntoschoolfull-time.
Attendanceatfootballmatcheshave_____sincethecomingoftelevision.
Theaddressbook________theemailaddressesofyourfriendsorgroupsofcolleagues.
