More than forty thousand readers told us what they looked for in close friendships, what the 【C1】______ friends, what they were willing to give in 【C2】______ , and how satisfied they were【C3】______ the quality of their friendships. The【C4】______ give little comfort to social critics.
Friendship【C5】______ to be a unique form. of 【C6】______ bonding. Unlike marriage or the ties that 【C7】______ parents and children, it is not defined or regulated by 【C8】______ Unlike other social roles that we are expected to【C9】______ as citizens, employees, members of professional societies and【C10】______ organizations--it has its own principle, which to promote【C11】______ of warmth, trust, love, and affection【C12】______ two people.
The survey on friendship appeared in the March 【C13】______ of Psychology Today. The indings 【C14】______ that issues of trust and betrayal are【C15】______ to friendship. They also suggest that our readers do not【C16】______ for friends only among those who are 【C17】______ like them, but find many【C18】______ differ in race, religion, and ethnic background. Arguably the most important【C19】______ that emerges from the data【C20】______ , is not something that we found--but what we did not.
【C1】

A. on
B. of
C. to
D. for