:2019外研版高考英语一轮复习选修8 2 Module2知能演练（带答案）

 
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(2018•烟台诊断)Grandparents who help out occasionally with childcare in their community tend to live longer than seniors who do not care for other people, according to a study from Berlin, Germany.
“Having no contact with grandchildren at all can negatively impact grandparents’ health. This link could be deeply rooted in our evolutionary past when help with childcare was important for the survival of the human species，” said Sonja Hilbrand, one of the researchers.
The findings are drawn from data on more than 500 people over age 70. Overall, after accounting for grandparents’ age and general state of health, the risk of dying over a 20­year period was one­third lower for grandparents who cared for their grandchildren，compared with grandparents who provided no childcare.
Caregiving was associated with a longer life even when the care receiver wasn’t relative. Half of all childless seniors who provided support to friends or neighbors lived for seven