For many years，scientist have known that laughing is good for the of our minds and bodies．Now we are learning that it's not just laughter．Having fun and playing are also good for us!Reserchers have found that play is good for people of all ages．Play actually leads to the growth of more nerver connection in the brain and gives us more brain power．

Play is necessary during childhood．As children play，they learn how to make friendship and relate to others．They develop their imaginations and become more creative．Kids carry these qualities with them as they grow older．

Amy Whitcomb teaches maths at a school in San Francisco．For several years，she has used gamespot to teach maths．In one class，students play a game with small bags of candy to figure out how many pieces in the bags are red．When they get the correct answer，they can eat the candy!Amy says，"If it's not fun，they're not going to want to be there．They're not going to want to learn．

The spirit of play continues through the teenage years into adulthood．The famous company Google，for example，keeps a lot of toys and games at different place in their best ideas when they are just"playing around"and let their imaginations go wild．

So next time you have to solve a difficult maths problem or can't think of a topic for an artice，take a short play break．Do a little dance，or play a quick game．Then come back to it．Maybe you'll be surprised at what your brain can do．

38．The example of the company Google is given to show that　　．

A．play is also fit adults                

B．everyone there works hard

C．they have a lot of toys and games      

D．it is very famous in the world

39．The underlined expression"figure out"in Paragraphy 3 probably means　　．

A．look after        

B．solve the problem of

C．draw a picture of  

C．play a joke on

40．According to the passage，you need to play if you　　

A．want to make friendship with others           

B．have to do some homework

C．fail to think of a topic for an article       

D．find a job in a big company

41．Which of the following can be the best title for the passage？　　

A．A maths lesson                                    

B．How children grow

C．The power of play                                 

D．Work hard，play hard．