Sometimes people cry when they are sad. Other times people cry tears of joy. But your eyes make tears all the time, whether you are crying or not. Do you know

the tears help keep your eyes healthy? They keep your eyes from drying out. A special area of the eye drips (滴) all the time. It keeps the eye humid.

If you look in a mirror, you can see tiny holes in the corners of your eyes. Each hole leads to a small tube that runs to your nose. Tears run slowly into this tube drip by drip. Day and night the

holes drain (流走) the tears away. If they didn’t, you would always look as if you were crying.

If you begin to cry, there are many more tears. The holes can’t drain all of them. Then extra tears run out onto your face.

Tears help keep eyes safe. If there is something harmful in the air, the eyes fill with tears. These tears coat your eyes. They keep the harmful air out.

Contact lenses (隱形眼鏡) can make the eyes too dry. Some people have to add tears to their eyes.

They buy bottles of eye drops to keep their eyes wet.

1.Eyes make tears no matter how people feel.

2.When you cry, tears run into your nose or onto your face.

3.If there is something harmful in the air, tears protect your eyes by covering them.

4.Contact lenses make you have more tears in your eyes.

5.Tears are harmful to your eyes.

1.A 2.B 3.A 4.B 5.B 【解析】文章講述了關(guān)于眼淚的事情。 1.根據(jù)But your eyes make tears all the time, whether you are crying or not.可知不管人們什么感覺，眼睛一直制造眼淚；故選A 2.根據(jù).If you begin to cry, there are many mor...
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