共用题干 What Is Cancer?

Cancer is actually a group of many related diseases that all have to do with cells.Cells
are the very small units that make up all________(1)things,including the human
body.There are billions of cells________(2)each person"s body.
Cancer happens when cells that are not normal grow________(3)spread very
fast.Normal body cells grow and divide and know when to stop growing.Over time,they
also die._______(4)these normal cells,cancer cells just continue to grow and divide
out of 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
normal cells around the_________(6)and damage the body"s healthy tissues.This
can make someone very _______(7).
Sometimes cancer cells break away from the original tumor and travel to other areas of
the________(8),where they keep growing and can go on to form new tumors.This
is how cancer__________(9).The spread of a tumor to a new place in the body is
__________(10)metastasis（转移）.
People with cancer may feel pretty sick at times一but can usually still do lots of
normal things._________(11)they are very sick,kids and teenagers with cancer
may still be able to go to school. They may be tired or bruise（出现青肿）easily, but they
__________( 1 2) sometimes go to camp , movies , and sleepover（在外过夜的）parties.
People with cancer still like the same things they did__________(13)they got sick.
Cancer in kids is rare一but today,many kids who do get cancer go on living normal
lives.The number of kids who beat cancer goes________(14)every year because of
new cancer treatments.So a lot of kids with cancer will some day drive cars,go to college,
have careers,and even get_________(15)and have families of their own. _________(6)

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