题目内容
根据下列文章,请回答 51～65 题。
What IS Cancer？
Cancer is actually a group of many relateddiseases that all have to do with cells．Cells are the very small。units thatmake up all_______ (1) things，including the human body．There are billions ofcells_______ (2)each parson’s body．
Cancer happens when cells that are not normalgrow_______ (3)spread very fast．Normalbody cells grow and divide and know when to stop growin9．Over time，they alsodie_______ (4)these normal cells，cancer cells just continue to grow and divide outof control and don’t die．Cancer cells usually group together to form. tumors(肿瘤)．
A growing tumor becomes a lump of cancer cells_______ (5)can destroy the normalcells around the_______ (6)and damage the body’s healthy tissues．This can makesomeone very_______ (7)．
Sometimes cancer cells break away from theoriginal tumor and travel to other areas of the_______ (8)。where they keepgrowing and can go on to form. new tumors．This is how cancer_______ (9)．Thespread of a tumor to a new place in the body is_______ (10)metastasis(转移)．Peoplewith cancer may feel pretty sick at times——but can usually still do lots of normalthings．_______ (11)they are very sick，kids and teenagers with cancer may stillbe able to go to sch001．They may be tired or bruise(出现青肿)easily, but they_______(12)sometimes go t0 camp．movies．and sleepover(在外过夜的)parties．People with cancer stilllike the same things they did _______(13)they got sick．
Cancer in kids is rare——but today, manykids who do get cancer go on living normal lives．The number of kids who beatcancer goes _______ (14)every year because of new cancer treatments。So a lot ofkids with cancer will some day drive cars，go to college，have careers，and evenget_______ (15)and have families of their own．
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根据下列文章,请回答 16～22 题。
A IDS
The World Health Organization(WHO)says as many as 10 million persons worldwide may have the virus that causes AIDS(艾滋病)．Experts believe about 350,000 persons have the disease。And one million more may get it in the next five years．In the United States，about 50,000 persons have died with AIDS．The country’s top medical official says more than 90 percent of all Americans who had the AIDS virus five years ago are dead．
There is no cure for AIDS and no vaccine(疫苗)or medicine to prevent it．However，researchers know much more about AIDS than they did just a few years ago．We now know that AIDS is caused by a virus．The virus invades healthy cells，including white blood cells that are part of our defense system against disease．It takes control of the healthy cell’s genetic(基因的)material and forces the cell to make a copy of the virus．The cell then dies．And the virus-caused particles move on to invade and kill more healthy cells．
The AIDS virus is carried in a person’s body fluids(液体)．The virus can be passed sexually or by sharing instruments used to take intravenous(进入静脉的)drugs．It also can be passed in blood products or from a pregnant woman with AIDS to her developing baby．
Many stories about the spread of AIDS are false．You cannot get AIDS by working or attending school with someone who has the disease．You cannot get it by touching drinking glasses or other objects used by such persons．Experts say no one has gotten AIDS by living with，caring for or touching an AIDS patient．
第 16 题 According to the WH0，there are now 10 million AIDS patients in the world．
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