Health experts have given sunshine a bad reputation, for good reason. After all, too much sun put you at increased risk of skin cancer. But several studies found that careful and brief sun ___1___ may fight disease.

Catching few rays may help ___2___ colon cancer by stimulating your skin to manufacture vitamin D. most adults don’t get enough so-called sunshine vitamin, probably because we avoid dietary source of D ___3___ fortified milk and dairy products. Measured doses of sunlight can help ___4___ the shortfall. A large-scale eight-year study revealed that people with the highest levels of vitamin D in their blood were ___5___ to get colon cancer. The main reason is ___6___ vitamin D seems to prevent cancerous changed in cells and also causes the bowel to ___7___ calcium, an anticancer mineral. Exposing your arms and chest___8___the sun for just 10 minutes a day in summer, and 20 minutes a day in spring and fall, can ___9___ vitamin D levels to the colon cancer-fighting range. For most people, this amount of sun is ___10___ increase the risk of skin cancer. But after this brief period of sun exposure, use sunscreen to protect your skin.

1. [A]explosion [B] exposure [C] expansion [D]exhibition

2. [A]ease [B] decrease [C] reduce [D]combat

3. [A]because of [B] such as [C] in spite of [D]for example

4. [A]make out [B] make for [C] make up for [D]make over

5. [A]most [B] more [C] least [D]less

6. [A]that [B] why [C] what [D]whether

7. [A]absorb [B] receive [C] accept [D]abuse

8. [A]under [B] in [C] to [D]for

9. [A]lift [B] rise [C] arise [D]raise

10. [A]very small to[B]small enough to [C] too small to [D]so small to

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答案: 1-5 BDBCC  6-10 AACDC