As is known to all, we live in a world of germs（细菌）. It is impossible to avoid exposure. Genetic makeups may give some people {#blank#}1{#/blank#} advantage over others. However, it does not stop people from becoming sick.

    All of us have been a victim of an {#blank#}2{#/blank#} (ill) at some point in our lives. Moreover, it is likely that we {#blank#}3{#/blank#} (get) sick again in the future. Our best chances of avoiding sickness {#blank#}4{#/blank#} (be) by exercising and employing good {#blank#}5{#/blank#} (habit).

    While good hygiene and exercise serve as obvious advice to most people, eating {#blank#}6{#/blank#} (healthy) is not always obvious. If you cannot define “healthy”, then your immune system will be happy {#blank#}7{#/blank#} (tell) you. The immune system is the foundation of our health. It works for us every day to keep us well. Ask {#blank#}8{#/blank#} (you): “Are you making its job easier {#blank#}9{#/blank#} harder?”

    Like any system, the immune system is not different. It has a tolerance too. If you eat unhealthily, your immune system will make you aware of it.

    Take a step in the right direction {#blank#}10{#/blank#} including some healthy food in your diet.

    The Internet is the{#blank#}1{#/blank#}(big) source of information in the world, which consists of millions of{#blank#}2{#/blank#}(page) of data. It dated back to 1969 when a US defense organization developed a way for all{#blank#}3{#/blank#} (they) computers to “talk” to each other through the telephone. Thus DARPANET, a network of computers {#blank#}4{#/blank#} (come) into being. But it was only used by the US army. Then in 1984, the NSF started the NSFNET network{#blank#}5{#/blank#} became known as the Inter-Network. Later an English scientist came up{#blank#}6{#/blank#} the idea of World Wide Web while {#blank#}7{#/blank#} (work) in Switzerland in 1989. He designed the first “web browser”, allowing computer users{#blank#}8{#/blank#}(access) documents from other computers. From that moment on, the Internet grew. Within five years{#blank#}9{#/blank#} number of Internet users rose from 600,000 to 40 million. Now, the Internet is used{#blank#}10{#/blank#} (wide) all over the world.

    A woman suddenly{#blank#}1{#/blank#} (go) blind in one eye after playing a mobile phone game for a whole week in Guangdong province last month. The unnamed woman admitted to playing the game {#blank#}2{#/blank#} (regular) for seven or eight hours without moving and finally lost {#blank#}3{#/blank#} (she) right eyesight.

    The game, Arena of Valor, {#blank#}4{#/blank#} (know) as Honour of Kings, has become hugely popular in China and is due to be limited across the US and Europe. Being {#blank#}5{#/blank#}world's most popular online battle game, it already has over 200 million players in China.

    The battle game puts together a team of five players {#blank#}6{#/blank#} have to fight others in a fantasy land filled{#blank#}7{#/blank#}characters , and players can buy extra features while playing. The eye injury follows series of {#blank#}8{#/blank#}(incident). In June, a child in Shenzhen stole 30,000 yuan (£3,450) from his parents to buy add-ons, and a 13-year-old in Hangzhou, severely injured his legs after jumping from a five-storey building to escape from his father was trying to stop him{#blank#}9{#/blank#}(play).

    In a country in which 60 percent of the population has a smart-phone, the game has been highly {#blank#}10{#/blank#} (success), partly because it is free to play.

    My interest in Chinese food started years ago, when I was a young reporter for the Washington Post. Our office wasn't far from Chinatown,{#blank#}1{#/blank#}I found some very good Chinese restaurants.

    That was the first time that I{#blank#}2{#/blank#}(notice) the fresh taste of the meat and vegetables of Chinese food.

    When I learned more about the food, I began to understand why{#blank#}3{#/blank#}has this special feature.

    Many years ago, china had{#blank#}4{#/blank#}energy crisis because it lost much of its wood due to over population and poor management of its forests. This{#blank#}5{#/blank#}(lose) was very bad for the country, of course, but it turned out to be very good for the food. Wood became very expensive and hard to get, so the Chinese had to either find a substitute for their{#blank#}6{#/blank#}(value) wood, or learn how to use it better. There weren't any substitutes so people found ways to economize.

    In order to economize in cooking, they had to use very little wood. So they started cutting their meat and vegetables{#blank#}7{#/blank#}small pieces before they put them in the hot oil. That way, the food cooked{#blank#}8{#/blank#}(fast) and they saved more fuel. The food{#blank#}9{#/blank#}(prepare) in this way kept its fresh flavor and it's this flavor{#blank#}10{#/blank#}attracts people from other countries to the art of Chinese cooking.