题目

When 17-year-old Quattro Musser hangs out with friends, they don't drink beer or cruise around in cars with their dates. _____, they stick to G-rated activities such as rock- climbing or talking about books.They are in good company, according to a new study showing that teenagers are increasingly delaying activities that had long been seen as rites of passage into _____. The study, published Tuesday in the journal Child Development, found that the percentage of adolescents in the U. S. who have a driver's license, who have tried alcohol, who date, and who work for pay has plummeted since 1976,Carry your ________ with you—money, jewelry, cameras and so on. 　　A．gifts 　　B．suitcase 　　C．bags 　　D．valuables