Tostudyaforeignlanguage,__________.
It'smore________tobuyaseasonticketifyoutraveleveryday.
Attendanceatfootballmatcheshave_____sincethecomingoftelevision.
Othersarguethatsincetheearthhasenduredalongstringoficeagesinthelasttwomilliontothreemillionyears,anywarmingis________tobetemporary.