To a worker, ________ from the point of view of society is necessary labor is from his own point of view voluntary play.
A
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。
—You were brave enough to raise objections at the meeting.
— Well, now I regret ________ that.
On average about ￡5000 a year is spent on each private school pupil,_______ the amount spent on state school pupils.