阅读理解。

     Some people may think too much sunlight can lead to cancer, so they always keep themselves away

from sunlight. But experts believe that proper exposure (暴露) to sunlight is good for us.

     For example, scientists think sunlight can help stop some diseases. They say that wearing sunscreen

(防晒油) all the time makes the body short of vitamin D.

     Vitamin D in fact stops us from more than 25 diseases and keeps bones and teeth healthy. However,

around 60% of the population are short of vitamin D in their blood. One of the easiest ways to get it is to

expose your skin to sunlight. Your body makes vitamin D from the sun faster than it takes in from food.

What's more, safely getting enough sunlight can make you look younger.

     However, not everybody likes sunlight. Some people should not be exposed to the sun without a strong

sun protection. Experts advise that just ten minutes of daily exposure to sunlight should be enough to give

us vitamin D we need.

1. What does the passage mainly tell us?

A. Don't expose to the sun.

B. Proper exposure to sunlight is good for our health.

C. We should stay in the sun as long as possible.

D. We can get vitamin D from food.

2. What will happen if we don't get enough sunlight for a long time? 

A. We will keep away from cancer.

B. We will get many diseases.

C. Our body will be short of vitamin D.

D. We will have more vitamin D in our blood.

3. The proper sunshine can keep our _______ healthy.

A. eyes and skin

B. bones and teeth

C. ears and blood

D. bones and eyes

4. The underlined phrase"take in" in the passage means "_______" in Chinese.

A. 吸收

B. 占用

C. 分享

D. 拿进来

5. Which is NOT true according to the passage? 

A. Scientists think our skin can get vitamin D from sunlight.

B. Most people have enough vitamin D in their blood.

C. Ten minutes of exposure to sunlight every day is enough for us to get vitamin D.

D. Our body gets vitamin D faster from the sun than from food.