“Cool”is a word with many meanings．Its old meaning is used to express a temperature that is a little bit cold．As the world has changed，the word has had many different meanings． 
   “Cool”can be used to express feelings of interest in almost anything．
   When you see a famous car in the street，maybe you will say，“It's cool．”You may think，“He's so cool，”when you see your favourite footballer． 
   We all maximize（扩大） the meaning of“cool”．You can use it instead of many words such as “new” or “surprising”．Here's an interesting story we can use to show the way the word is used．A teacher asked her students to write about the waterfall（瀑布）they had visited．On one student's paper was Just the one sentence，“It's so cool．Maybe he thought it was the best way to show what he saw and felt． 
   But the story also shows a scarcity（缺乏）of words．Without “cool”，some people have no words to show the same meaning．So it is quite important to keep some credibility（可信性）．Can you think of many other words that make your life as colourful as the word “cool”？ I can．And I think they are also very cool．

给划线的汉字选择正确的读音（填写字母），并根据拼音写汉字。

        人生的岁月是一串珍珠，漫长的生活是一组乐曲，而青春，是其中最璀càn____的珍珠，最精彩的乐____（A．lè B．yuè）章。青春是美丽的，因为它似勃发的幼芽，淙淙____（A．cóng B．cōng）的溪水，奔腾的浪花，滚向前的车轮。青春的阳光，照亮我们追求的方向，让我们认准目标，zhǎn____翅奋飞，为给未来增添一片美丽的华美而努力。