Others argue that since the earth has endured a long string of ice ages in the last two millionto three million years, any warming is ________ to be temporary.

He thoroughly understood the society __________.

She got a job as an assistant stage manager at the Cambridge Arts Festival Theatre, thinkingthat it might ________ to a career as a playwright ( 剧作家 ).

Sixtypercentoftelevisionviewerschosehimastheir_______actor.

It'smore________tobuyaseasonticketifyoutraveleveryday.