If you want to stay young, sit down and have a good think. This is the research finding of

a team of Japanese doctors, who say that most of our brains are not getting enough exercises — and as a result, we are aging unnecessarily soon.

Professor Taiju Matsuzawa wanted to find out why【C1】______healthy farmers in northern Japan appeared to he losing their ability to【C2】______and reason at a relatively early age, and how the process of【C3】______could be slowed down.

With a team of【C4】______at Tokyo National University, he set【C5】______measuring brain volumes of a thousand people of different ages and【C6】______occupations.

Computer technology【C7】______the researchers to obtain precise measurements of the【C8】______of the front and side sections of the brain,【C9】______relate to intellect and emotion, and determine the human character.(The【C10】______section of the brain, which controls【C11】______like eating and breathing, does not【C12】______with age, and one can continue living without intellectual or emotional【C13】______.)

Contraction of front and side parts — as cells die【C14】______— was observed in some【C15】______in their thirties, but it was still not【C16】______in some sixty-and seventy-year-olds.

Matsuzawa【C17】______from his tests that there is a simple【C18】______to the contraction normally【C19】______with age —【C20】______the head.

【C1】

A．otherwise

B．clockwise

C．likewise

D．anywise