请大家帮助解答一下,谢谢!

完型填空:
<1>It was not a house, not even a squatter's hut. He thought everybody lived far too elaborately, expensively,anxiously.What_____is a house?No one needs privacy:natural acts are not shameful.(good)
<2>Due to his intense concern with the individual,it also may be incorrect to label Rogers a humanist.Some would say that___emphasizes the importance of pro-social behavior,not actualization of oneself, and it is not clear that these two things are one and the same.(humanism)
<3>Most of the problems in physics can't be solved exactly in closed form.Therefore we have to learn technology for making clever_____,such as power series expansions,saddle point integration,and small(or large) pertubations.(approximate)