20．Generational differences and the economy （经济） are shifting （转移） more responsibilities for children from their parents to grandparents，according to a new survey．
More than one-third of grandparents aged 50and older contribute financially to their grandchildren's upbringing，and 11percent have a grandchild living with them，the poll （民意测验） by AARP，the group for 36million older US citizens，showed．
Forty percent of people who responded to the telephone survey，whose average age was 69，reported spending more than $500on grandchildren over the past year beyond traditional gifts． Education costs accounted for 53percent，daily expenses for 37percent and medical costs for 23percent．Sixteen percent provided daycare for grandchildren．
"They are the safety net for American families，helping to pay for practical expenses and necessities，"said Amy Goyer，AARP's multi-generational and family issues （问题） expert．
"We see many providing daycare services，while growing numbers even have grandchildren living with them，"she said，referring to the 16percent who watch their grandchildren while the parents are at work or school．
Generally nearly 90 percent of the 1，904 grandparents questioned said they play a very or somewhat important role in their grandchildren's lives，and about 70percent live within 50miles of the closest one．
The poll conducted by Woelfel Research Inc．also showed that grandparents were increasingly keyed to the younger generation's life issues and preferred ways of communicating．
More than one-third connect with their grandchildren via email or text messaging，while half said they routinely discuss topics ranging from values and spirituality to drug and alcohol use．
Nearly 40 percent said they had discussed dating or sex with at least one grandchild．Some 60percent said they spoke with their grandchildren at least once a week．
Most of the grandparents said they had five or more grandchildren，while one-fourth said they had grandchildren of a different race or mixed race．
60．The passage mainly tells usD．
A．the differences between generations are huge
B．how Woelfel Research Inc．conducted the poll
C．parents are the safety net for American families
D．grandparents take more responsibilities for grandchildren
61．Grandparents discuss with their grandchildren on various topics EXCEPTA．
A．races B．values C．drug use D．spirituality
62．Which of the following is TRUE about grandparents？D
A．Most of them have grandchildren of a different race．
B．One third keep in touch with their grandchildren via email．
C．Nearly 40percent discussed dating with more than one grandchild．
D．About three fifths communicate with their grandchildren at least once a week．
63．What does the author think of the phenomenon mentioned in the passage？D
A．Reasonable． B．Unbelievable．
C．Acceptable． D．Not given．
