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 {#blank#}2{#/blank#}(become) sick.

    All of us have been a victim of an {#blank#}3{#/blank#}(ill) at some point in our lives. Moreover, it is likely that we {#blank#}4{#/blank#}(get) sick again in the future. Our best chances of avoiding sickness {#blank#}5{#/blank#}(be) by exercising and employing good {#blank#}6{#/blank#}(habit).

    While good hygiene and exercise serve as obvious advice to most people, eating healthily 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 yourself: ＂Are you making its job easier {#blank#}8{#/blank#} harder?＂

    Like any system, the immune system is no {#blank#}9{#/blank#}(difference). It has a tolerance too. If you eat unhealthily, your immune system will make you aware of it.

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

    Travelling around the Sydney district is a wonderful experience.

    The sightseeing options are{#blank#}1{#/blank#}(end), but most travelers begin on the harbor at the Sydney Opera House. Known as one of the wonders of the world, it is {#blank#}2{#/blank#}photographer's dream.

    There is a huge {#blank#}3{#/blank#}(choose) of accommodations available in the city and its surrounding area. Darling Harbor is famous for its restaurants and four-star hotels. Under the famous Sydney Harbor Bridge is the Rocks shopping district, which {#blank#}4{#/blank#}(call) “the heaven of shoppers”. You can spend at least a half day{#blank#}5{#/blank#} (wander) through the alleys and side streets to take{#blank#}6{#/blank#}everything the shops offer. On the other side of harbor {#blank#}7{#/blank#}(lie) another must-visit spot, the Taronge Park Zoo. With an exciting collection of native animals, including lions and giraffes,{#blank#}8{#/blank#}is rare to find a zoo with a view of Darling Harbor and the city skyline.

    The Royal Botanic Garden is within walking distance of the Opera House, and is an absolutely perfect place for a picnic lunch. After lunch, take a walk to Sydney Tower,{#blank#}9{#/blank#}you can get 360-degree{#blank#}10{#/blank#}(forget) views of the city.

    Many kinds of dinosaurs' bones {#blank#}1{#/blank#}(find) recently by Chinese scientists in Nanyang county, Henan Province. {#blank#}2{#/blank#} the scientists inspected the bones, they were surprised {#blank#}3{#/blank#}(spot)) these dinosaurs could not only run {#blank#}4{#/blank#}the others but also climb the trees.

    Dinosaurs died {#blank#}5{#/blank#} suddenly around 60 million years ago. Some scientists think {#blank#}6{#/blank#}came after an {#blank#}7{#/blank#}(expect) incident when a huge rock from space hit the earth {#blank#}8{#/blank#} put too much dust into the air. Others think the earth got too hot for the dinosaurs to live on any {#blank#}9{#/blank#}(much). Nobody knows {#blank#}10{#/blank#}sure why and how dinosaurs disappeared from the earth in such a short time.

    Contrary to {#blank#}1{#/blank#}some people might assume, evidence {#blank#}2{#/blank#}(show) that sharks seldom attack humans. There are three types of shark attacks. In the main type, the shark attacks you because it mistakes you {#blank#}3{#/blank#} a fish, {#blank#}4{#/blank#}when it tastes human flesh it decides  {#blank#}5{#/blank#} (give) up and swims away. In the second type, the shark {#blank#}6{#/blank#}(push) you with{#blank#}7{#/blank#}nose to find out if you are fit to be eaten, and then bites you{#blank#}8{#/blank#}it thinks you are. In the third type, the shark waits for you to swim by, and then attacks you all of{#blank#}9{#/blank#}sudden. The last two types of attack more often result in the {#blank#}10{#/blank#}(die) of humans.

    With the development of modem technology, people can stay {#blank#}1{#/blank#} (connect) with their families and friends easily, however far apart they are from each other. WeChat is one of the most {#blank#}2{#/blank#} (frequent) used means of communication in China. It is reported that the number of the WeChat users {#blank#}3{#/blank#} (reach) over 1.1billion so far.

    Once joining the WeChat, people can find more and more people start to add them {#blank#}4{#/blank#} friends. They don't have to consider time {#blank#}5{#/blank#} (zone) when communicating. Another reason why ifs so popular is that it costs nothing. It's also very convenient for people to immediately update {#blank#}6{#/blank#} they are doing by WeChat.

    However, addiction to WeChat will rob people of the time that should otherwise {#blank#}7{#/blank#} (spend) on something more important. And the many so-called friends on it are not really friends at all, who simply want {#blank#}8{#/blank#} (put) ads or sell items on Moments. Besides, people on the Wechat are more likely to compare {#blank#}9{#/blank#} (they) with others, which will make them feel bad when finding some people seem to be {#blank#}10{#/blank#} (success).