13．閱讀短文，從各題所給的四個選項中，選出最佳答案．
Cars are lots of fun，but they could also be dangerous．We have to be careful when we drive them or ride in them．
It's always a good idea to put on your seat belt when you're in a car．Why？Think about this example：You put an egg on a skateboard and give it a push．If the skateboard hits a stone，it will stop，but the egg won't．It will fly through the air，hit the ground and break．
Now，think what would happen if you tied the egg to the skateboard．When the skateboard hits a stone，the egg won't go flying； it will stay safely on the skateboard．
Volvo，a famous Swedish carmaker，was the first to use seat belts in 1849．
Air bags are also very important for car safety，because sometimes a seat belt isn't enough．If the car is going really fast and runs into something，seat belts could even hurt the people who wear them．Most new cars have air bags in front of and next to the seats．When a car hits something，its air bags will come out quickly in less than one second to keep the people inside safe．

66．The passage mainly tells usA．
A．two important ways to keep safe in cars  
B．how air bags work to make cars safe
C．how seat belts work to make cars safe    
D．why we must tie the egg to the skateboard
67．The writer gives the example of the egg toC．
A．tell us that eggs are easy to break
B．show how to wear a seat belt
C．show why it's important to wear a seat belt in a car
D．tell us what a skateboard is
68．Seat belts can make us safer because．C
A．we are interested in them
B．they can stop us from hitting other cars
C．they can help us stay safely on the seats  
D．they are made of strong materials
69．Air bags are important for cars becauseB．
A．they are made of plastic
B．they can also help us to keep safe in a car
C．they can keep cars running slowly
D．they are put in front of and next to the seats
70．Which of the following is TRUE according to this passage？D
A．It won't be dangerous if there are seat belts or air bags in a car．
B．Now most of new cars still have only one air bag．
C．When a car hits something，its air bags will come out a few minutes later．
D．Volvo was the first to use seat belts．

分析 文章介紹了駕車和乘車時系安全帶自我保護的原理，安全氣囊是如何保護駕車人和乘車人安全的以及安全帶的歷史，告訴我們乘車時系安全帶是非常重要的．

解答 答案：66．A  主旨歸納題．根據(jù)整篇文章內(nèi)容及其第四段句子Volvo，a famous Swedish carmaker，was the first to use seat belts in 1849．沃爾沃，一個著名的瑞典汽車制造商，在1849年第一個使用安全帶．和最后一段第一句Air bags are also very important for car safety，對于汽車安全氣囊也很重要．可知文章介紹了駕車和乘車時系安全帶自我保護的原理以及安全氣囊是如何保護駕車人和乘車人安全的．故選A．
67．C   細節(jié)理解題．根據(jù)第二段第一行句子It's always a good idea to put on your seat belt when you're in a car．Why？Think about this example：You put an egg on a skateboard and give it a push．If the skateboard hits a stone，it will stop，but the egg won't．當(dāng)你在車?yán)飼r，系好安全帶總是一個好主意，為什么？想想這個例子：你把一個雞蛋放在滑板上推一下，如果滑板撞到石頭，它就會停下來，但是蛋不會．和第三段句子Now，think what would happen if you tied the egg to the skateboard．When the skateboard hits a stone，the egg won't go flying； it will stay safely on the skateboard．現(xiàn)在想想如果你把雞蛋綁在滑板上會發(fā)生什么事，當(dāng)滑板撞到石頭上時，雞蛋就不會飛了，它會安全地留在滑板上．可知通過將雞蛋系在滑冰板上再碰石頭，而雞蛋不破的原理來告知人們乘車駕車系安全帶的重要性．故選C．
68．C   細節(jié)推理題．根據(jù)第三段句子Now，think what would happen if you tied the egg to the skateboard．When the skateboard hits a stone，the egg won't go flying； it will stay safely on the skateboard．現(xiàn)在想想如果你把雞蛋綁在滑板上會發(fā)生什么事，當(dāng)滑板撞到石頭上時，雞蛋就不會飛了，它會安全地留在滑板上．可知通過將雞蛋系在滑冰板上碰石頭而雞蛋不破的原理，告訴我們系安全帶可以讓人在座位上處于安全狀態(tài)．故選C．
69．B   細節(jié)理解題．根據(jù)最后一段第二行句子When a car hits something its air bags will come out quickly in less than one second to keep the people inside safe．當(dāng)一輛汽車撞上某東西時，它的氣囊會在不到一秒鐘的時間內(nèi)迅速打開，保護里面人的安全．可知當(dāng)發(fā)生相撞時安全氣囊打開，同樣起到保護安全的作用．故選B．
70．D   細節(jié)判斷題．根據(jù)第四段句子Volvo a famous Swedish carmaker was the first to use seat belts in 1849．沃爾沃一個著名的瑞典汽車制造商，在1849年第一個使用安全帶．可知沃爾沃是第一個用安全帶的是正確的．故選D．

點評 在通讀全文的基礎(chǔ)上，根據(jù)全文大意，展開邏輯思維，瞻前顧后，認真觀察選項，仔細推敲，確定最佳答案．

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