Diabetes is a kind of sickness. Blood sugar is so high that the body is unable to process it. There are many symptoms：losing weight while being hungry all the time.Diabetes does damage to many organs and even leads to swelling up.Treatment for diabetes is to take insulin with a needle or some tablets.The factors that cause diabetes are complex.One theory is reasonable, saying that diabetes relates to genetics.,　　

　　糖尿病是一种疾病。血糖那么高以至于身体转化不了它。糖尿病有许多症状，如一直饥饿，身体消瘦。糖尿病危害很多脏器甚至引起浮肿。对糖尿病的治疗就是用针头注射胰岛素或服药片。糖尿病的诱因很复杂。有个说法比较合理，说糖尿病与基因有关。

　　加餐练(一)　完形阅读组合练

　　Ⅰ.完形填空

　　Whenever Christmas is drawing near, an Iowa radio station has an annual tradition. Listeners send in "wish letters"， and the hosts select some to __1__. They've been making Christmas dreams come true for more than 20 years, but they never __2__ they would receive a letter from a person who was already dead.

　　Last week, the hosts of the station invited listener David Schmitz to their __3__， but the station didn't tell him who had sent in the __4__for his family. They read the letter to him on the __5__："Hello, my name is Brenda Schmitz. When you receive this letter, I will have already __6__ my battle to cancer."

　　The big __7__ made David's eyes swim in tears.

　　David heard three wishes from his __8__ wife. The first was to his new partner."Thank you, I love you whoever you are." And the second："For my family, a wonderful __9__， with many scenic spots where they all can enjoy their companionship as a new __10__ and make memories that will be with them forever." __11__， she wanted to give a night of food and fun to the hospital __12__ that cared for her during her __13__ days.

　　The letter was written by Brenda two months before __14__.She prepared it and asked a friend to send it to the station once her husband fell in love __15__.

"I began to know Jayne, my present wife, __16__.On a cold afternoon, I took my little son, Marx, to the __17__ where a group of seagulls were flying over his head.I didn't __18__ it until Marx burst into tears, running to Jayne and asking her to be his __19__， who was playing there with her two children.Later, she became Marx's new mom and she __20__ him as her own