题目

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 exercise, and as a result, we are growing old unnecessarily soon. Professor Taiju Matsuzawa wanted to find out why quite healthy farmers in northern Japan appeared to be losing their ability to think and reason at a rather early age, and how the speed of getting old could be slowed down. With a team of researchers at Tokyo National University, he set about measuring brain sizes of a thousand people of different ages根据单词释义用正确的单词形式完成句子 The young man has to ________this big family. (hold up or keep in place，provide for)