B．they are driving in the wrong lane

　　C．they should slow down their speed

　　D．they are approaching the speed limit

　　答案　C　[细节理解题。文章最后一段，表明chevrons给驾车人的印象比他们实际的开的要快，而且路也变窄了，所以他们会放慢速度。]

　　50．The American Automobile Association Foundation for Traffic Safety plans to ________.

　　A．try out the Japanese method in certain areas

　　B．change the road signs across the country

　　C．replace straight, horizontal bars with chevrons

　　D．repeat the Japanese road patterns

　　答案　A　[细节理解题。由文章第三段最后一句话，他们将在选择的道路上试验这种方法。]

　　51．What does the author say about straight, horizontal bars painted across roads?

　　A．They are falling out of use in the US.

　　B．They are applicable only on broad roads.

　　C．They cannot be applied successfully to traffic rules.

　　D．They tend to be ignored by drivers in a short period of time.

　　答案　D　[细节理解题。文章倒数第二段最后一句话“...within months as drivers become used to seeing the painted bar.”可知。]

　　E

　　As the train went close to the seaside town where I was going to spend my holiday，I went into the corridor to breathe in the fresh sea air.I exchanged a few words with one of the passengers，whom I had met earlier on the station platform.

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