Mostpeopleagreethatapetaddsjoytoaperson'slife．Scientistsarenowfindingthathavingapetmaykeepitsowner（41）___．Andgoodhealthmayaddyearstoaperson'slife．Scientistshavebeen（42）___thelinkbetweenpetsandhea

　　Most people agree that a pet adds joy to a person's life．Scientists are now finding that having a pet may keep its owner（41）___．And good health may add years to a person's life．

　　Scientists have been（42）___ the link between pets and health for years．In 1990，a study was done with people aged 65and older．It（43）___ that pet owners went to the doctor less than people（44）___ pets．Do pets make people（45）___？Are people able to handle their everyday lives better？Alan Beck，who is a researcher，says that（46）___ the answer to the questions is yes，then having pets may be a good idea．

　　Can pets also help people live longer？Rebecca Johnson did a study to（47）___．Johnson teaches nurses how to care for（48）___ people．Her study shows that having pets may cause people to（49）___ more slowly．

　　The human body makes many chemicals．Some of the chemicals make people feel（50）___．Others make people feel bad．In Johnson's（51）___，levels of the"good"chemicals（52）___ when people were around pets while levels of the"bad"chemicals went down．The good（53）___ seemed to slow the aging of cells．If this is（54）___，maybe people should spend more time with their（55）___．Then people might feel better and（56）___ longer．

　　You might be allergic（过敏的）to pets．Or you may not want to（57）___ a pet．Never fear．A robotic，or computer pet may be just the thing for you．

　　Scientists are testing computer pets，like the robotic dog AIBO．They want to see if（58）___ pets can help people the way（59）___ dogs do．

　　Will a robotic pet（60）___ the real pet sitting with you on the sofa？Something tells us that it will probably become a reality．

　　41．A．healthyB．excitedC．madD．hurried42．A．carrying outB．making upC．looking atD．breaking down43．A．warnedB．showedC．remindedD．advised44．A．t