Each zebra has its own unique pattern of distinctive stripes (带), just {#blank#}1{#/blank#}humans have their own unique pattern of fingerprints, Zebras stick together in herds (兽群). Within a herd, zebras tend {#blank#}2{#/blank#} (stay) together in smaller family groups. Families are generally made up of a male, several females{#blank#}3{#/blank#}their young.

    As zebras graze, they use their sharper front teeth to bite the grass, and then use their duller back teeth to crush and grind. A zebra's teeth keep growing for{#blank#}4{#/blank#} (it) entire life, because constant chewing{#blank#}5{#/blank#}(wear) them down.

    Zebras are{#blank#}6{#/blank#} (constant) on the move to find fresh grass and water. Sometimes they gather in huge herds of thousands as they migrate to better feeding{#blank#}7{#/blank#} (area). They often travel in{#blank#}8{#/blank#} (mix) herds with other grazers and browsers, such as wildebeest.

    Zebras groom (理毛) one another, If you see two zebras standing close{#blank#}9{#/blank#} each other and it looks like they're biting each other, don't worry. They're pulling loose hairs off each other as they groom. Grooming also feels good to a zebra—it's like having an itch scratched,

    While most zebras are least endangered, Grevy's Zebra{#blank#}10{#/blank#} (classify) as endangered.

    Sun Yat-sen,{#blank#}1{#/blank#} was the leader of the 1911 Revolution, first suggested the idea of a dam across the Yangtze River in 1919. Three quarters of China's energy {#blank#}2{#/blank#} (produce) by burning coal. In 1993, China used 1.2 billion tons of coal for heating and generating{#blank#}3{#/blank#}(electric).{#blank#}4{#/blank#} (fortunate), burning coal causes serious air pollution and increases global warming. The dam will generate electricity equal{#blank#}5{#/blank#} about 40 million tons of coal without causing so much air pollution.

    On October 23^rd, 2018，President Xi Jinping announced the opening of the Hong Kong– Zhuhai-Macao Bridge (HZMB) at an opening ceremony in Zhuhai, Guangdong province.

    The HZMB,{#blank#}1{#/blank#} (locate) at the waters of the Lingdingyang of Pearl River Estuary, is a huge sea crossing, linking Hong Kong and Macao to the Chinese mainland city of Zhuhai. As the world's{#blank#}2{#/blank#}(long) sea-based project, the 55-kilometre bridge is the result of five years of research and another nine years of building. It has been described as one of the “seven{#blank#}3{#/blank#}(wonder) of the modern world” by the Guardian.

    The project{#blank#}4{#/blank#}(make) up of a 22.9-kilometer-long main bridge, a 6.7-kilometer-long tunnel and an artificial island off the bridge. It is designed with {#blank#}5{#/blank#}service life of 120 years. It can withstand a strong wind equal{#blank#}6{#/blank#} a maximum Beaufort scale 16. The bridge's engineers had to consider many environmental factors to protect the{#blank#}7{#/blank#}(surround) environment while building the bridge. Chinese white dolphins, an endangered species that lives in the area,{#blank#}8{#/blank#} (be) a particular concern.

    The HZMB will make{#blank#}9{#/blank#}much more convenient to travel between the three areas it connects. It will bring people in Hong Kong, Macao and Guangdong within a “one-hour living circle”,{#blank#}10{#/blank#}is expected to attract more visitors to the Guangdong-Hong Kong-Macao Greater Bay Area. It will be a transport link as well as a social, economic, cultural, and tourism connection among the three areas.

Color blindness is very common. It affects{#blank#}1{#/blank#} (rough) 1 in 12 men and 1 in 200 women in the world. People {#blank#}2{#/blank#} blindness can't see colors in a normal way.

There are {#blank#}3{#/blank#}(variety) causes of color blindness. For the majority of color-blind people, color blindness is genetic, although some people become color-blind as a result of other diseases, such as diabetes(糖尿病), or they have {#blank#}4{#/blank#} condition over time due to the aging process, etc.

Most color-blind people can see {#blank#}5{#/blank#} (thing) as clearly as other people, but they are unable to fully "'see" red, green or blue light. There are different types of color blindness but there are extremely rare cases {#blank#}6{#/blank#} people are unable to see any color at all. The most common color blindness is red/ green color blindness. Although {#blank#}7{#/blank#}(know) as red/green color blindness, it doesn't mean {#blank#}8{#/blank#}(suffer) will only mix up red and green. It means they mix up all colors that have some red or green as part of the whole color.

The effects of color blindness can {#blank#}9{#/blank#} (classify) into mild，moderate(中等的) or severe. About 40% of color-blind people are even unaware that they're color-blind. Statistically speaking, most people {#blank#}10{#/blank#} (have) a moderate form of red/ green color blindness can only identify 5 colored pencils from a standard box of 24 pencil crayons.

What should we do when everything{#blank#}1{#/blank#}(feel) so out of control？

Living with so much uncertainty is hard. Human beings long for information about the future in the same way we long for food, water and other primary{#blank#}2{#/blank#}(reward). Our brain sperceive uncertainty as a threat, and they try to protect us by{#blank#}3{#/blank#}(remind) us to focus on creating certainty.  

But sometimes—maybe always—it's{#blank#}4{#/blank#}(effective) for us not to attempt to create certainty. {#blank#}5{#/blank#}evolution might have commanded our brains to resist uncertainty,  we can never{#blank#}6{#/blank#}(real) know what the future will bring.  And during improbable situations like the pandemic(疫情) , {#blank#}7{#/blank#}has greatly disturbed our routines and totally destroyed our plans, we need to learn to live with uncertainty.  

"Uncertainty is the only certainty there is," wrote mathematician John Allen Paulos. "Knowing how{#blank#}8{#/blank#}(live) with insecurity is the only security." What have you always wanted to do？What outcome are you hoping for？How can you make{#blank#}9{#/blank#}real life during this time？Live that life. When we take{#blank#}10{#/blank#}(responsible) for our lives, we will have the real power that comes from creating the life we want.