Remember how great exercise was when you were a little kid? Back then，racing around the playground or skipping rope for hours，you weren't thinking fitness，you were thinking entertainment．But in this age of high-tech home equipment and underused(未充分利用的)gym memberships，the simple joy of jumping rope has been forgotten．Rediscovering it will give you a total-body exercise you can find． Although considered an excellent form of exercise，jumping rope has never gained widespread acceptance because of two fundamental reasons．First，most people recognize jumping rope as an excellent form of cardiovascular (心血管的) exercise，but they also believe that it is simply too difficult．In other words，they don't think they'll be able to continue jumping for the near 20 minutes that it takes to achieve a beneficial physical result．Second, many view it as somewhat boring and too repetitive-not as something fun or enjoyable． As a matter of fact，jumping rope can be great fun if you find a proper way to practise it．Instead of doing the usual two-foot bounce over and over again，people good at rope-jumping often change their pattern every 10 or 20 jumps．A single bounce，a double bounce，a skip，a knee-up，side swings，as well as a variety of other easy-to-learn free-style rope-jumping． Now researchers are learning that jumping rope also prepares the brain for learning．It is an exercise allowing both brain hemispheres(半球)to perform in parallel(并行地)to each other．In short，jumping rope can be a life-long activity requiring little equipment，time and space，yet leading to a much healthier life． 小题1:From the first paragraph we learn that_______ ． A．all people now have more advanced equipment B．jumping rope has disappeared from people's memories C．racing around the playground was preferred D．people now like to have exercise in a gym 小题2:Rope jumping has not spread widely because_______ ． A．it benefits the cardiovascular system B．it requires little equipment，time and space C．it is neither easy nor enjoyable D．it is considered boring 小题3:The first sentence in the 3rd paragraph implies_____ ． A．there are many ways to follow B．the usual way should not be used C．the easiest way is always the best D．there is only one proper way to follow 小题4:According to the researchers, jumping rope _____. A．only prepares the brain for learning. B．is suitable for students only C．helps both brain hemispheres work together D．can be dangerous for old people 小题5:What is the author's attitude towards rope jumping? A．He is arguing against it. B．He is sitting on the fence of it. C．He is in favor of it. D．He is not clear about it.