下面的短文有10处空白,短文后列出12个词,其中10个取自短文,请根据短文内容将其分别放回原有位置,以恢复文章原貌,Mental Activities Help Save Memory 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% . "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.
　　A．early B．tests
　　C．seldom D．taught
　　E．faster F．produce
　　G．study H．current
　　I．involved J．neglect
　　K．rate L．really