单项选择题 Why does the author give a definition of instinct at the beginning of the article
问答题 Certainly the humanist thinkers of the eighteenth and nineteenth centuries, A(who are) our ideological ancestors, thought that the goal of life was the unfolding of a person’s potentialities; B( what mattered to) them was the person C(who is much), not the one D(who has much or use much).
问答题 If marriage exists only as an intimate relationship that A(can be terminated at will), and family exists B(only by virtue of) bonds of affection, both marriage and family C(are relegated to) the market place of trading places, with individuals maximizing D(his psychological capital) by moving through a series of more or less satisfying intimate relationships.