11．Being a teenager can be challenging，but it can also be exciting．You*re becoming more independent and making decisions for yourself．You are also learning to take risks and solve problems better．And changes are happening throughout your body，even in your brain．
The changes in your brain are influencing how you develop into an adult．Imagine the structure（結構）of your brain is like a big road map．Lots of roads lead to different destinations（目的地）．When you were a child as you learnt new things，your brain created more and more roads to different destinations．By the time you become a teenager，many different roads lead to the most important places on the map．Now your brain's job is to make that map more efficient．
As a result，your experiences as a teenager actually influence the way that your brain develops．If you spend hours playing video games，what skills do you use？You learn to see something with your eyes and respond to it with your hands．As you develop those skills，your brain is making sure that the roads leading to them are especially fast and efficient．So，your video-game playing could be preparing you for a career such as a pilot．
This is a great time for you to practice new skills and discover what you're good at and try what you love doing．Go out and try different activities，and stick to them if
you think they're useful．Remember that with everything you do，you're shaping your brain for the future．
72．What happens as children learn new things？C
A．Their brains make the maps more efficient．
B．The structures of their brains are like big road maps．
C．Their brains create more roads to different destinations．
D．Many different roads lead to the most important places．
73．What does the underlined word"it"in Paragraph 3refer to？B
A．Your brain．
B．Something you see．
C．Your skill．
D．Something you learn．
74．What's the writer's advice for teenagers？D
A．Teenagers should learn to be more independent．
B．Teenagers should work harder and more efficiently．
C．Teenagers should play more video games in order to be a pilot．
D．Teenagers should experience more and stick to the useful activities．
75．Which would be the beat title for the passage？B
A．Making Decisions for Yourself．
B．Developing Your Brain for the Future．
C．Ways of Changing Your Brain．
D．Changes Happening in Your Brain．
分析 文章大意：這是一篇日常生活類閱讀，主要介紹作為一個年輕人要具有挑戰(zhàn)性，這樣去鍛煉你的大腦，去學習冒險和更好地解決問題．嘗試練習新技能，在好時間做喜歡的事情，嘗試不同的活動，并堅持下來，這對塑造你的大腦，對你未來的發(fā)展有好處．
解答 72．答案：C．細節(jié)理解題．根據(jù)第二段第二行When you were a child as you learnt new things，your brain created more and more roads to different destinations當你是個孩子時你學到了新的東西，你的大腦創(chuàng)造了越來越多的道路去不同的目的地．可知，選C．
73．答案：B．詞意猜測題．根據(jù)句意"你學會用你的眼睛看到的東西，并用你的雙手回應它．"，可知，這里的it代指的是Something you see你看到的東西，選B．
74．答案：D．細節(jié)理解題．根據(jù)最后一段Go out and try different activities，and stick to them if you think they're useful去嘗試不同的活動，并堅持如果你覺得他們是有用的．可知，作者建議青少年應該體驗更堅持有益的活動．選D．
75．答案：B．標題猜測題．根據(jù)最后一句Remember that with everything you do，you're shaping your brain for the future．記住，你所做的一切，你正在為你的未來塑造你的大腦．可知，短文主要講通過各種鍛煉，挑戰(zhàn)，學習技能發(fā)展興趣等，為未來開發(fā)自己的大腦，題目可以是為未來開發(fā)你的大腦，選B．
點評 閱讀題型，要注重句子與句子之間、段落與段落之間邏輯關系以及對篇章的整體理解．根據(jù)所給問題選擇正確選項完成試題．
