The skin, which acts as a barrier     1    disease, toxins and the sun's harmful rays, is an essential part of your body. So if your skin gets burned, it can lead to very serious injuries. Depending on the     2    (deep) of skin damage, burns are divided into three types. First-degree burns only affects the top few millimeters of the skin. Second degree burns go below the top layer of the skin. They are serious and take a few weeks     3     (get) better. Third-degree burns affect every layer of the skin. They cause very severe internal     4    (injury).

The cool water stops the     5    ( burn)process and reduces the pain and swelling. Remove any clothes using scissors     6    necessary， unless you see the fabric     7     (stick) to the burnt skin.     8     (apply) oil to the injured areas is a bad idea, as it will keep the heat and may cause     9     (infect). If the victim is suffering     10    second or third-degree burns, he/she needs to be taken to the hospital at once.

Recently it has been observed that more and more people are switching to organic vegetables and fruits. They are     1     (nature) and safe for the human body to consume. Organic farming     2     (increase) and evolved in a large way due to this large demand by now. Farmers are getting better at the art of     3    (grow) organic vegetables and there are many helpful tips they share with other members of the organic farming circle.    4     you are a gardener and interested in growing organic vegetables,     5     is wise to be aware of these tips and choose the best organic garden tip that helps     6     garden to produce healthy and better vegetables.

One helpful organic garden tip that works well for all farmers is     7     (make) your own fertilizer. This is     8     kind of fertilizer made of dry leaves, fruit peelings and kitchen food disposables. These materials are buried underground and kept there     9     some time. With fermentation（发酵）taking place the soil becomes richer with nutrients. This means you get a fertilizer that does not have chemicals at all. This fertilizer enhances the soil and so the vegetables and fruits are     10     (health) and better.

What is fear? Fear is a self-made thought of our mind. Usually, fear should     1     (overcome), or it may do harm to us. But sometimes fear is good, but it is not our best friend.

There are different types of fear,     2     (range) from fear of failure, fear of taking risks, fear of dogs, and fear of height to fear of drowning and so on. Now the question is     3     we can get rid of fear. The only way to overcome our fear     4     (be) to face it. As soon as we face fear     5     (brave), it will be over.

Everyone is afraid inside. Sometimes fear is     6     (help) to us and a little fear is necessary for our     7     (grow). For example, fear of falling makes us walk properly, fear of accidents makes us drive the car carefully and fear of failure makes us work hard.

On     8     other hand, fear stops us     9     moving further. We have to move ahead and leave fear behind. At this point, fear is our weakness and we must try to overcome it. At the same time, remember not     10     (scare) anyone for your fun because fear makes people sick and that’s not right.

What are the benefits of laughter? Laughter     1     (use) as a signal for being part of a group —it signals acceptance and positive interactions with others. In fact, laughter is important, and has been shown to have many     2     (benefit) effects on the human body in different ways. Just check out these health benefits of laughter.

Boosts (增强) your immune system.    3     (study) have shown that laughter boosts the immune system, increasing the number of antibody-producing T cells. This then makes us less likely     4     (catch) coughs and colds. It also lowers the levels of at least four hormones (激素) which are connected with stress. So, after a good laugh you should be far less anxious.

Improves your breathing. Laugh more and more, because laughter empties your lungs of the air     5     it takes in, resulting in a cleansing effect - similar     6     deep breathing. This is     7     (especial) helpful for people who are suffering from asthma (哮喘).

Protects your heart. Your heart is a muscle and, like any muscle in your body, it gets     8     (strong) and functions better when exercised. Regular laughter is like     9     (get) a gym membership for your heart The study said that 15 minutes of laughter a day is as important for your heart     10     30 minutes of exercise 3 times a week.