任务型阅读,阅读下面短文，在表格内的空白处填入合适的答案(每格限填一词)。
Some rays (光线) of sunlight are harmful to our eyes. Even on cloudy days, the sun’s rays can still damage (损害) our eyes . Besides ,damage to our eyes comes from other things as well, such as reflection (反射),especially when we are around water, sand, or even snow.
This is the reason why people who often go out wear sunglasses for protection. It is advised that we wear sunglasses whenever we are outdoors during the day. Some people may wonder, though, how sunglasses protect our eyes.
The secret is that the coating (涂层) and the lenses(镜片) are used. Sunglasses are tinted (染色) with various colors; each color tint is used to prevent a certain type of light. With coating, UVB rays are unable to pass through the lenses. The coating and the special design of the lenses can help greatly to protect our eyes from harmful rays.
Moreover, sunglass lenses are designed with an anti-reflective coating to reduce reflection from water and snow. This reflection prevention is good to drivers and people who take part in water and snow sports.
On the market, there are lots of sunglasses that are not of good quality, which not only have no effect(作用) on protecting our eyes from harmful rays, but can also do more damage to our eyes. Therefore, when you buy sunglasses, you should ask the person who is selling them whether the sunglasses are of a good quality. If they say they do not know, you should go to another store until you can find a shopkeeper that can tell you which pair offers the best protection. '
Title: How sunglasses_________our eyes

Some harmful things to our eyes	Sunlight	Damaging our eyes even when it is ________
Refection	Damaging our eyes when we ate around water, sand or snow
The secret of sunglasses	The coating	Preventing certain types of light
The lenses	_________ reflection from water and snow
The_______on buying sunglasses	Avoiding getting sunglasses of bad quality
Going to shops whose keepers can give information on sunglasses ________ the best protection