题目内容：

The choices people make can cause cancer. Not everyone who 1. (use) tobacco products will get cancer, but the chance of getting certain 2. (type) of cancer increases with tobacco use. The recent research 3. (show) us that the constant misuse or overuse of alcohol may cause cancer of the mouth and throat as well recently.

Sometimes cancer can be caused by radiation 4. (find) in sunlight and X-rays, in addition 5. other places. This doesn't mean you should stop getting X-rays or stay indoors, but limiting your 6. (expose) to radiation can reduce the chances of developing cancer. The X-rays you get at 7. doctor's or dentist's office are not 8. (typical) enough to cause cancer.

And sometimes, the reason 9. someone gets cancer is simply an unfortunate mystery. Some cells in the body may start to increase and change. Doctors and researchers can see it happening, 10. they cannot provide a description of why it started.