18．You either have it，or you don't-a sense of direction，that is．But why is that some people would find their way across the Sahara without amap，while others can lose themselves in the next street？
Scientists say we're all born with a sense of direction，but it is not properly undrstood how it works．One theory is that people with a good sense of direction have simply worked harder at developing it．Research being carried out at Liverpool University supports this idea and suggests that if we don't have it，we lose it．
"Children as young as seven have the ability to find their way around，"says Jim Martland，Research Director of this project．"However，if they are not allowed out alone or are taken everywhere by car，the never develop the skills．"
Jim Martland also said that young people should be taught certain skills to improve their sense of direction．He makes the following suggestions：
If yu are using a map，turn it to the way you re facing．
If you leave your bike in a strange place，put it near something like a big stone or a tree．Pay attention to landmarks on the route（路線） as you go away from your bike．When you return，go back along the same route．
Simplify the way of finding your direction by using lines such as streets in a town，streams，or walls in the countryside to guide you．Count your steps so that you know how far you have gone and note any landmarks such as tower blocks or hills which can help you find out where you are．
29．What is true of seven-year-old children according to the passage？C
A．They never have a sense of direction without a map．
B．They should never be allowed out alone if they lack（缺乏） a sense of direction．
C．They have a sense of direction and can find their way around．
D．They can develop a good sense of direction if they are driven around in a car．
30．Scientists believe thatB．
A．some babies are born with a sense of direction
B．everybody has a sense of direction from birth
C．people never lose their sense of direction
D．people learn a sense of direction as they grow older
31．According to the last paragraph，the best way to find your directio is toA．
A．use walls，streams，and streets to guide you
B．a(chǎn)sk policemen for directions
C．remember your route by looking out for steps and stairs
D．count the number of landmarks that you see．
分析 本文講訴了方向感，是人與生俱來的能力．但是之所以有人的方向感好有人的方向感差，是因?yàn)椋藗円ゾ毩?xí)提高自己的方向感．如果你的方向感很差，作者提供了一些方法來培養(yǎng)方向感．
解答 29．C．細(xì)節(jié)理解題．根據(jù)文章："Children as young as seven have the ability to find their way around．可知，他們有方向感并能夠找到路．故選C．
30．B．細(xì)節(jié)理解題．根據(jù)文中Scientists say we're all born with a sense of direction可知，科學(xué)家們說我們方向感與生俱來．故選B．
31．A．細(xì)節(jié)理解題．根據(jù)Simplify the way of finding your direction by using lines such as streets in a town，streams，or walls in the countryside to guide you．可知，最簡(jiǎn)單的尋找方向的方法是通過使用線，如城里的街道，或鄉(xiāng)下的溪流，墻來引導(dǎo)你．故選A．
點(diǎn)評(píng) 本文是一篇人生感悟類閱讀，題目涉及多道主旨大意題，細(xì)節(jié)理解題，推理判斷題．做題時(shí)學(xué)生應(yīng)仔細(xì)閱讀原文，把握文章主要內(nèi)容，聯(lián)系文章上下文內(nèi)容并結(jié)合所給選項(xiàng)含義，從中選出正確答案，一定要做到有理有據(jù)，切忌胡亂猜測(cè)．
