题目内容：
Double Income and No Kids (DINK) becomes fashionable in China. The DINK couples are usually regarded as those who have higher educations and __31__ careers with higher incomes. The increase in DINK families has shattered the Chinese traditional idea of the family and __32__ typical.A survey conducted recently in Beijing by a market survey company __33__ that about 3.3 percent of 1,300 surveyed families in Beijing said they have __34__ plans to have children. It is estimated there are about 600,000 DINK families in large cities like Beijing, Tianjin, Shanghai, and Chongqing.
Why they choose such a lifestyle is concluded in __35__ reasons. Some are showing great worry for the rapid growth of population; some are indulged in building a more well-off family; some are showing sharp __36__ to get themselves free from the obligation of raising children.
__37__, most people still believe it is necessary to bear a child to keep the family line on. As an old Chinese saying goes, there are three aspects in failing to be a filial son and the __38__ serious one is to have no heir for the family. So childless couples will suffer discrimination __39__ family members and neighbors.
But it is clear that the new tide of ideas has come, which suggests young people __40__ to choose their own way of life. They are installing modern ideas into traditional families and society. In the modernization process, personal choices will be highly respected.
（ ） A．stable
B．available
C．achievable
D．liable
参考答案：
答案解析：