According to a recent survey, violence did exist in schools. Students showed their fear and parents and teachers also expressed their great concern about it. Experts hope the whole {#blank#}1{#/blank#} (social) pay more attention to the mental health of adolescents(青少年).

    Nowadays, school violence is a hot issue. I think this is a phenomenon, {#blank#}2{#/blank#}  calls for our great concern. We should try every effort {#blank#}3{#/blank#} (prevent) violence happening at school for more and more students would drop out of school {#blank#}4{#/blank#} their personal safety could not {#blank#}5{#/blank#} (guarantee). In fact, violence can be learned. Children learn violent behavior from adults or from {#blank#}6{#/blank#} they see on television or on {#blank#}7{#/blank#} Internet.

    If I meet with school violence, I will not answer violence {#blank#}8{#/blank#} violence, for it will result in {#blank#}9{#/blank#} (much) fighting. I will tell my teachers or parents about it. I think they will help me deal with it well and they will protect me from the bad guys.

    All in all, every student should behave {#blank#}10{#/blank#} (he) and keep away from violence.

    It is not a secret {#blank#}1{#/blank#} trees are vital to our life. They provide us with food, wood and most {#blank#}2{#/blank#} (important), oxygen. Now there is one more thing we can add to this list—blocking out harmful bacteria from water.

    The discovery {#blank#}3{#/blank#} (make) by a team {#blank#}4{#/blank#} (consist) of scientists from the Massachusetts Institute of Technology (MIT) and high school students {#blank#}5{#/blank#} were seeking a natural water filter(过滤)—one that would help communities in developing countries that do not have {#blank#}6{#/blank#} (accessible) to modern water filter systems.

    The {#blank#}7{#/blank#} (research), led by Professor Rohit Karnik, decided to turn{#blank#}8{#/blank#} trees for help, because they could allow liquid to flow through, while blocking out air bubbles.

    They began by cutting 1.5-inch-wide sections of tree bark from the branches of a white pine tree. The people related then tested the wood's filtering ability by pouring water containing red dye particles of different sizes through. To their {#blank#}9{#/blank#} (amaze), they found that it was effective in trapping all the particles. Greatly {#blank#}10{#/blank#} (encourage), the team conducted another experiment, this time with water that contained bacteria. Sure enough, the sapwood held back 99% of the bacteria, allowing only 1% to flow through.

    Keeping a diary in English is one of the effective ways to improve our English writing ability.

    Compared with other forms of writing, it is shorter and takes {#blank#}1{#/blank#}(little) time. It can help us to develop the habit of thinking in English. If we persist in this practice, gradually we'll learn how {#blank#}2{#/blank#}（express）ourselves in English. In keeping a diary in English, we certainly run up against many {#blank#}3{#/blank#}(difficult). In the first place, it often happens that we have trouble in {#blank#}4{#/blank#}(find) appropriate words and phrases to give expression to our mind. Secondly, there {#blank#}5{#/blank#}(be) many idiomatic ways of saying things in Chinese. And it is extremely hard for us to put them into English {#blank#}6{#/blank#}(proper).

    As far as I am {#blank#}7{#/blank#}(concern), my suggestion is {#blank#}8{#/blank#}we should always have a notebook and a Chinese-English dictionary within easy reach. Whenever something beats us, we can first put it down in our notebook and then consult our dictionary. We can also ask our English teacher {#blank#}9{#/blank#}help, if necessary. In short, I believe that it is of great use to keep a diary in English for {#blank#}10{#/blank#}development of our writing skills.

    Most children with healthy appetites are ready to eat almost anything that {#blank#}1{#/blank#}(offer)to them. A child seldom dislikes food {#blank#}2{#/blank#}it is badly cooked. The way meal is cooked and served is most important and a {#blank#}3{#/blank#}(good) served meal will often improve a child's appetite. Never ask a child{#blank#}4{#/blank#}he likes or dislikes the food and never discuss likes and dislikes in front of him or allow anybody else to do{#blank#}5{#/blank#}. Parents should accent the fact{#blank#}6{#/blank#}he likes everything and he probably will. Nothing healthy should be omitted from the meal because of a{#blank#}7{#/blank#}(suppose)dislike. At meal times it is a good idea to give a child a small part and let him come back for {#blank#}8{#/blank#}second helping rather than give him as much as he is likely to eat all at once. Do not talk too much to the child during meal times,{#blank#}9{#/blank#}let him get on with his food; and do not allow him to leave the table immediately after a meal or he will soon learn to swallow his food so that he can hurry back to the toys in his room{#blank#}10{#/blank#}no condition must a child be forced to eat.

    I have always enjoyed listening to music. It helps me calm down after {#blank#}1{#/blank#} busy day, and I am also one of those {#blank#}2{#/blank#} can listen and study at the same time. I am not fond of jazz music, but I like many other {#blank#}3{#/blank#} (type) of music. When I was a child, I used to listen to music on the radios. With the {#blank#}4{#/blank#} (invent) of personal computers and cellphones, I prefer to listen on the phone, as new functions {#blank#}5{#/blank#} (add) to them in the past few years. The technology was developed in response {#blank#}6{#/blank#} customer demand. Some people {#blank#}7{#/blank#} (affect) by anxiety start to feel relaxed while listening to music on the phones. {#blank#}8{#/blank#} worry about not being able to use it well. However, I am {#blank#}9{#/blank#} dependent on the cellphones that I fail {#blank#}10{#/blank#} (live) without them.