Mental activities help save memory. Doing mental activities is helpful. Reading books and writing at any age may save memory, a new ____1__ finds.The study was conducted by some American neurologists（神经病学家）.It __2___294 people. They were given ___3___ 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 ___4___ age.Some of those people did mental activities both ___5___ and late in life. They had a slower ___6___ of decline in memory than the others. The others ___7___ did such activities. Their rate of decline in memory was 48%____8__. “Mental activities like reading and writing are great. They ___9___ bring benefits. We shouldn’t ___10____ 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