题目内容：

    Undoubtedly, the best way to prevent illnesses of the mind is to exercise the brain. Here’re some great exercises to sharpen your mind.

Never stop learning. 1. One way is to take classes online through websites like Coursera, org or Edx. org, where you can take courses from the top universities for free. Perhaps you would like to learn a new language. 2. There are wonderful language programs available through RosettaStone. com and Duolingo.com which offer many lessons to choose from.

Read something everyday. Reading itself is a wonderful brain exercise. Make a point to read something every day. It could be a newspaper, book, blog or magazine, but the more informative it is, the more of a workout it will be for your thinking cap. 3.

Exercise your body. Exercising your body affects your strength, mood and fitness. Exercise excites the nervous system and causes you to perform at a higher level.

4. Communicating with others on topics of common interest is a great workout. Talking about in-depth topics like headline news and political interests exercises your ability to pay attention and focus. There are always many like-minded people who enjoy the same hobbies or share the same beliefs.

Play games. The act of solving problems and figuring out puzzles is excellent for keeping your brain in shape. 5. Solving math equations or word puzzles, and even just a quick game of Bubble Witch will do wonders for your thinking processes.

A.Associate with others.

B.Refer to professionals.

C.If you are short on time, just read the dictionary.

D.Such exercises promoted the growth of new stem cells in humans.

E.It’ll encourage areas of the brain that will improve your native tongue too.

F.The great news is, there are so many possible ways of learning new things.

G.Whether you prefer Crossword or Sudoku, playing puzzles will help you stay sharp.