A．17% expressed their support for it.

　　B．Few people responded sympathetically.

　　C．83% believed it had a bad influence.

　　D．The majority thought it was a trend.

　　D　[推理判断题。根据第二段中的...83 percent of the people said Mrs.Robinson's decision will influence grandparents in the American family.可知，83%的人认为Mrs.Robinson的决定将影响美国家庭的祖父母，但没说这有不好的影响，故排除C项；由此句也可判断出，17%的人对她的决定是持反对意见或是保持中立态度，而不是支持，故排除A项；根据第二段中的Two­thirds believe more families will follow the example of Obama's family.可知，三分之二的人认为更多的家庭将效仿奥巴马的家庭，由此可知它将成为一种趋势，故选D项，同时排除B项。]

　　3．What did Crosby say about people in the 1960s?

　　A．They were unsure of themselves.

　　B．They were eager to raise more children.

　　C．They wanted to live away from their parents.

　　D．They had little respect for their grandparents.

　　C　[细节理解题。根据第三段的第一句In the 1960s we were all a little wild and couldn't get away from home far enough or fast enough to prove we could do it on our own...可知，在20世纪60年代，人们都有点儿狂野，急于"远走高飞"来证明自己的能力，这与C项的表述"他们想远离父母生活"相吻合，故选C项。A、B、D三项表述的内容在文中未提及。]

　　4．What does the author suggest the grandparents do in the last paragraph?

　　A．Make decisions in the best interests of their own.

　　B．Ask their children to pay more visits to them.

　　C．Sacrifice for their struggling children.

D．Get to know themselves better.