完成下面题目。
今年春天，在我国流行的“禽流感”，对人类的生命健康敲响了警钟。请就此拟写两条电视公益广告语，提醒人们增强卫生、健康意识。    
①__________________________。②______________________________

阅读下面短文，按照句子结构的语法性和上下文连贯的要求，在空格处 填人一个适当的词或使用括号中词语的正确形式填空。

    There is a big desert ____ our village and Hope Town. If you want to go to Hope Town, there are two ____ (way) for you. One is short but dangerous; the ____ is long but safe. Many people died in order ____ (get) to Hope Town sooner.

  “We need some trees in the desert,” said ____ old man. But soon all the young trees died out in the hot sun. “Don't ____ (worried). We can use them as our road signs,” said the old man，“Every time we walk along them，pull them upward so ____ we can still see them.”

   One day a businessman was walking to Hope Town. Some villagers gave him the ____ (advise).

  “Maybe it's the only time for me to come here. It doesn't matter to pull the dry trees upward ____ Not,” he thought. When he walked to the half-way point, a heavy wind came. In no time he ____ (lose) his way. And soon the poor businessman died!

下列句子中，加线的词语使用恰当的一项是（      ）