Toaworker,________fromthepointofviewofsocietyisnecessarylaborisfromhisownpointofviewvoluntaryplay.
A、whatA
本题要求填入一个关系代词引导主语从句，并在主语从句中作主语，所以选 what。
I would love ________ to the party last night but I had to work extra hours to finish a report.
People appreciate _______ with him because he is knowledgeable and humorous.
—Youwerebraveenoughtoraiseobjectionsatthemeeting.
—Well,nowIregret________that.
名词解释：copyright
The challenge is not one of expansion. _______, the rapid growth in enrollment over the last 40 years has come to an end.
