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.

    Eating organic food will not make you healthier, according to researchers at Stanford University, although it could cut your {#blank#}1{#/blank#}(expose) to pesticides（杀虫剂）. They looked at more than 200 studies of the content and {#blank#}2{#/blank#}(associate) health gains of organic（有机的） and non-organic foods. Overall, there {#blank#}3{#/blank#}(be) no difference in the nutritional content, although organic food was 30% less likely {#blank#}4{#/blank#}(contain) pesticides.

    The researchers looked at 17 studies comparing people who ate organic {#blank#}5{#/blank#} those who did not and 223 studies {#blank#}6{#/blank#} compared the levels of nutrients, bacteria, and pesticides in various foods. However, none of the human studies ran for longer than two years, {#blank#}7{#/blank#}(make) conclusions about long-term{#blank#}8{#/blank#}(outcome) impossible. And all of the available evidence was{#blank#}9{#/blank#}(relative) weak and highly variable, which the researchers said was unsurprising because of all the different variables.

    Dr Crystal Smith-Spangler, the lead researcher, said “Some believe that organic food is always healthier and more nutritious. But as {#blank#}10{#/blank#} matter of fact there isn't much difference between organic and conventional foods, if you're an adult and make decisions based simply on your health.”

    Longjing tea, also known as West Lake Dragon Well tea, is named  {#blank#}1{#/blank#} its production region—Longjing Village of West Lake in Hangzhou, Zhejiang Province.

    West Lake Dragon Well tea has topped list of  {#blank#}2{#/blank#} ten most famous teas in China. The superior geographical environment and good quality water resources around West Lake have contributed much to the growth of Longjing tea.

    Legend has it that Emperor Qianlong  {#blank#}3{#/blank#} (visit) Lion Peak Moutain during his Hangzhou travels, and he saw several  {#blank#}4{#/blank#} (lady) picking the tea at the foot of the mountain. He was so interested in it that he decided to have a try himself.

    {#blank#}5{#/blank#} picking the tea, he received the news of his mother s illness, so he  {#blank#}6{#/blank#} (careless) put the leaves in his right sleeve and left Hangzhou for Beijing. He visited his mother immediately upon his  {#blank#}7{#/blank#} (arrive) in Beijing, and Empress Dowager smelt the fragrance of the leaves in his sleeve and wanted to have a taste. Emperor Qianlong ordered some tea for Empress Dowager, and she found  {#blank#}8{#/blank#} (she) completely refreshed after  {#blank#}9{#/blank#} (drink) a cup of tea, and she even praised it as a treatment for all ills. From then on, Shi Feng Longjing tea  {#blank#}10{#/blank#} (list) as the tribute tea (贡茶）especially for Empress Dowager.

    China, which takes pride in inventions in ancient times, has once again shown its ability {#blank#}1{#/blank#}(change)the world with its “new four great inventions”: high-speed railways, electronic payments, shared bicycles and online shopping. The “new four great inventions” are all related to China's high-tech innovation(创新), {#blank#}2{#/blank#}improved the quality of people's lives. “My wallet is no longer in use. I can buy and eat {#blank#}3{#/blank#}I want simply with a tap of my phone,” said Lin Jinlong, {#blank#}4{#/blank#}overseas Chinese student from Cambodia,{#blank#}5{#/blank#}(add) that “even pancake sellers are using Alipay (mobile payment). We can also order food at home, and it is of great {#blank#}6{#/blank#}(convenient). If I were at home in Cambodia, I would have to go outdoors.” The bikes themselves are not new, but the operating model of bike-sharing is based {#blank#}7{#/blank#}satellite navigation system, mobile payment, big data and other high technologies. It is{#blank#}8{#/blank#}(increase) clear that China is innovating and no longer copying Western ideas. This is partly because China skipped over the PC age and went directly to mobile. China has the{#blank#}9{#/blank#}(large) mobile use in the world.

    In terms of the “new four great inventions”, Charlie Dai, principal analyst of American market research company Forrester, said, “These products and service{#blank#}10{#/blank#}(improve) customer experience so far, improving national and global economy at the same time”.

    The Beijing Vanke-Shijinglong Ski Resortis located{#blank#}1{#/blank#}Yanqing District, a national demonstration area for ecological construction. With Longqing Gorge to its east and Guanting Reservoir to its west, it has fresh air and an {#blank#}2{#/blank#}(impress) environment.{#blank#}3{#/blank#}(build) in 1999, it was the first large ski resort to be built near Beijing. In 2016, a massive renovation project {#blank#}4{#/blank#}(start) by Vanke, the Beijing Badaling Tourism General Company, and the original Beijing Shijinglong Ski Resort.

    NASA has a new job listing, and it's no joke. The US space agency is looking for a "joker" to join their {#blank#}1{#/blank#} (plan) mission to Mars.

A mission to Mars is no laughing matter. {#blank#}2{#/blank#} is known that Mars is 225 million kilometers away from Earth. A trip there would take around eight months in a small spacecraft. "When you're living with others in a confined (封闭的) space for a long period of time, such as on a mission to Mars, problems are likely {#blank#}3{#/blank#} (happen)" Jeffrey Johnson, a scientist at the University of Florida, {#blank#}4{#/blank#} (say) to the Guardian. This is probably {#blank#}5{#/blank#} NASA wants an astronaut with a sense of humor. "These are people that have the {#blank#}6{#/blank#} (able) to pull everyone together." Johnson said.

    In {#blank#}7{#/blank#} (stress) situations, perhaps humor is a way to know we aren't alone. We can share our stress by {#blank#}8{#/blank#} (laugh) together. Then we can focus on our jobs instead of just worrying.

But if you're hoping that your favorite TV comedian will fly to Mars, that {#blank#}9{#/blank#} (possible) won't happen. "Being funny won't be enough to land somebody the job," Johnson said, "They also need to be an excellent scientist and engineer." Besides, it's required that they {#blank#}10{#/blank#} (be) in top physical condition.