单选题
[填句补文]Children think that being grown up means being able to do exactly as they please. ________. The chance to discover whether that freedom is as wonderful as it sounds is a chance more and more Americans are taking.
A.It‘s now socially acceptable， even fashionable， to live alone.
B.The number one reason given by most people for living alone is that they simply enjoy doing what they want when they want to do it.
C.Living alone is a luxury.
D.It seems that many grown-ups today are realizing that childhood dream.
正确答案：D
答案解析：空格前面句子中出现了grown up，该词在D中正好有呼应，所以重点关注。后句中的“自由”也是“梦想”中的一个部分，所以D是答案。