Manychildrenlikeridingabikelikeanadult（成年人）．Herearesomeimportantstepstolearntorideabike．Firstofall，it'snecessarytochooseasmallbike．Incaseoflosingyourbalance（平衡），youcanputyourfeettothegr

　　Many children like riding a bike like an adult（成年人）．Here are some important steps to learn to ride a bike．

　　First of all，it's necessary to choose a small bike．In case of losing your balance（平衡），you

　　can put your feet to the ground at once．

　　Second，find a big place for the first part of your practice．Don't forget to wear your helmet to keep safe．

　　It's very important to learn how to keep your balance．An easy way is to take your bike in a higher place．Sit on the bike seat with your feet on the ground．Lift both feet a few inches to let the bike roll down．When you start to fall，you only need to put your feet on the ground．Practice several times like this until you get your balance．

　　It's time to learn how to pedal（踩踏板） after you get your balance．Remember to look front

　　when riding．

　　Catch the braking（刹车） lightly，then slowly increase the pressure to get to a full stop．

　　Braking hard while going fast may cause you to fall over．

　　根据材料内容选择最佳答案，并将正确的选项涂在答题卡相应的位置．

　　46．Why should a child choose a small bike？___

　　A．Because he or she can put both feet to the ground at once．

　　B．Because a small bike is easy to ride．

　　C．Because a small bike goes slowly．

　　D．Because a small bike is cheaper．

　　47．What can help a child keep safe？___

　　A．Finding a big place for riding．

　　B．Wearing the helmet．

　　C．Keep the feet on the ground．

　　D．Using the braking all the time．

　　48．What does a child need to do when he starts to fall？___

　　A．To put the feet on the ground．

　　B．To brake the bike quickly．

　　C．To jump down from the bike．

　　D．To ask for help．

　　49．How many steps are mentioned（提到） in the passage？___

　　A．Three

　　B．Four

　　C．Five

　　D．Six

　　50．What's the passage mainly about？___

　　A．How to ride a bike．

　　B．How to keep safe when riding．

　　C．Keeping bala