A group of frogs were traveling through the forest, but unluckily two of ____fell into a hole. The other frogs tried to help them. When they saw how____ the hole was, they cried to the two frogs that they could not be saved. The two frogs didn't care and tried their____to jump up out of the hole. The other frogs kept saying that they were sure to die. Finally, one of the two frogs heard____the other frogs were saying and gave up. Then he fell ____and died.

    However, the other frog continued to jump as hard as he could____last, he made it out. When he got out, the other frogs asked, "Did you hear us?" The frog, who had a____hearing, explained, "I thought you were encouraging me ____ the time."

    The story teaches us a ____ There is power of life and death in the tongue(言语）.An encouraging word to those who are down can help them out ____a discouraging word can kill them.

设m是实数，f（x）=m﹣ $\frac{2}{2^x+1}$ （x∈R）

已知反比例函数y= $\frac{k}{x}$ 的图象在二四象限，一次函数为y=kx+b（b＞0），直线x=1与x轴交于点B，与直线y=kx+b交于点A，直线x=3与x轴交于点C，与直线y=kx+b交于点D．