I'msorryIforgottowrite;Ihadsomuchelse________mymind.
A、overWhenworkersareorganizedintradeunions,employersfindithardtolaythem________.
Theaddressbook________theemailaddressesofyourfriendsorgroupsofcolleagues.
Tostudyaforeignlanguage,__________.
Seniormembersofthestaffcompetedeagerly________thepositionofsalesmanagerinthecompany.
SinceWilliamhadbeenseriouslyillforseveralmonths,hisparentswereworriedabout________toreturntoschoolfull-time.
