问题补充：
It is said that the eyes are the windows of our soul. Beautiful and bright eyes not only show a good health but also make you look very attractive. However, to have healthy eyes you have to look after them properly. Yours eyes need everyday attention.
Pay more attention to your diet. First, eat food that is good for your eyes. They are fresh fruits and vegetables such as fish, eggs, and milk. Besides, a regular amount of vitamins A and B2 should also be taken.
A regular and sound sleep is necessary. It relaxes the eye muscles and gives them the rest required. Sleep not only helps the body to repair its tired tissues(组织). Usually, you must sleep for at least seven to eight hours every day. Loss of sleep can give you dark circles under the eye.
You must exercise your eyes every day. Blink(眨眼) yours eyes at regular periods, which makes the eyeballs watery, and gives them a good wash.
We use our eyes in many unnoticeable and wrong ways. Fox example, if a small thing goes into our eye we start rubbing(揉) it, which is wrong. Rubbing can cause damage to your eyes. Don’ t read or write in poor or bright sunlight. Always use sunglasses as sunlight can cause eye tiredness. Light should not shine directly in your eyes. Too much reading, writing, watching television or working on the computer can also cause eye tiredness.
Remember to always take care of God’s most beautiful gift to you. Your life will be very colorless without your eyes.
46to keep your eyes healthy
47
Eating food good to your eyes,48as fresh fruits, vegetables and food high in protein.
Taking a proper amount of Vitamins A and B2 regularly
Sleep
Having a regular and sound sleep is 49
Reducing loss of 50.
Eye 51
Having your eyes exercised every day.
Blinking your eyes at regular periods.
Eye using
It’s 52to rub your eye when something goes in.
Read or write in soft sunlight.
Light should never shine in your eyes in a 53way.
Take a 54after reading, writing, watching TV or working on the computer.
Eye55matters a lot
How
答案：
(答案→)How
解析：
【小题1】how“怎样，如何”，how to do sth.“如何做某事”。故填How.
【小题2】根据第二段第一句Pay more attention to your diet可知，本段讲的是饮食。故填Diet。
【小题3】根据第二段第三句such as fish, eggs...可知，such as“例如”。填such。
【小题4】根据第三段第一句A regular and sound sleep is necessary可知，填necessary。
【小题5】根据第三段最后一句Loss of sleep can give you dark circles under the eye可知，睡眠应该充足。故填sleep。
【小题6】根据第四段第一句You must exercise your eyes every day可知，应该每天锻炼眼睛。exercise既可作动词，也可作名词，故填exercising或exercise。
【小题7】根据倒数第二段第一句We use our eyes in many unnoticeable and wrong ways可知，列举的是错误的作法。故填wrong。
【小题8】根据倒数第二段倒数第三行Light should not shine directly in your eyes可知，光不能直接照射眼睛。修饰名词way用形容词，故填direct。
【小题9】take a rest=have a rest“休息”。故填rest。
【小题10】根据最后一段可知，没有了眼睛，生活将是苍白的。眼睛的健康很重要。作主语应该用名词形式，即health。故填health。
