Hangzhouhua (杭州话)：use it or lose it
   There are about 6.000 languages in the world and some experts say that as many as half of these languages will disappear(消失) in the next one hundred years. Will Hangzhouhua be one of ____ ? It's a ____  that more people are asking.
   In China, Putonghua is the official language. That ____  it's the language of government, business and the media (媒体). And it's also the language that is____  in schools.
   Hangzhou is a special city. It used to be the capital of Wu and Yue States in the 10th century during the Five Dynasties period. Now it is modern, fashionable and also beautiful. And Hangzhouhua shows that by being modern, fashionable and beautiful.
   Young people still speak Hangzhouhua but not as ____  as their parents and grandparents. They are under more and more pressure to speak Putonghua. So the language is being used____  often in everyday life. Some people want to keep the language from disappearing completely ____  building museums and having cultural festivals to save it. But a language isn't a painting ____ a book. It's a living thing and you ____  use it or lose it.
   If people ____  using it in their daily lives, a museum or a festival will not help. It will be lost forever, like the Yangtze River dolphin.

用科学记数法表示下列各数：

1万=____ ；1亿=____ ；80000000=____ ；-76500000= ____

补写出下面名篇名句中的空缺部分。

①《归去来兮辞》一文中，表现作者听亲人说知心话，以琴书为伴，乐以忘忧的句子是：____，____。

②王勃《滕王阁序》一文写景字字珠玑，尤其是“____，____”着力表现大自然的色彩变幻，突出秋日景物的特征，被前人誉为“写尽九月之景”。

③为了打消晋武帝可能有的猜忌，李密在《陈情表》中表达自己很想官职显达的句子是：____，____。