Doing mental activities is helpful. Reading books and writing at any age may save memory, a new __31 __finds.
The study was conducted by some American neurologists (神经病学家). It __32__ 294 people. They were given __33__ on memory and thinking. They had the tests once a year for six years. They were also asked to talk about their mental activities during childhood, in their youth, during middle age and at their __34__ age.
Some of those people did mental activities both __35__ and late in life. They had a slower __36__ of decline in memory than the others. The others __37__ did such activities. Their rate of decline in memory was 48% __38__ .
“Mental activities like reading and writing are great. They __39__ bring benefits. We shouldn’t __40__ their effects on our children, ourselves and our parents," said Robert Wilson, lead author of the study.
该空应填____.