Not all memories are sweet. Some people spend all their lives trying to forget bad experiences.

   Now American researchers think they are close to developing a pill, {#blank#}1{#/blank#} will help people forget bad memories. The pill is {#blank#}2{#/blank#}(design)to be taken immediately after a frightening experience. They hope it might reduce, or {#blank#}3{#/blank#}(possible) erase (抹去) the effect of painful memories.

   In November, experts tested a drug on people in the U.S. and France. The drug stops the body from {#blank#}4{#/blank#}(release) chemicals that fix memories in the brain. So far, the research {#blank#}5{#/blank#}(suggest) that only the emotional effects of memories may be reduced, not that memories are wiped out. They are not sure to the degree people's memories are affected.

   The research has caused a great deal of {#blank#}6{#/blank#}(argue). Some think it is {#blank#}7{#/blank#}bad idea, while others support it. Supporters say it could lead to pills which prevent or treat soldiers' troubling memories after war. They say that there are many people who suffer {#blank#}8{#/blank#}terrible memories. {#blank#}9{#/blank#}, those who are against the research say that maybe the pills can change people's memories and changing memories is very {#blank#}10{#/blank#}(danger) because memories give us our identity.

    Icebreaker to the North Pole is a new book {#blank#}1{#/blank#} the well-known Chinese writer Bi Shumin. It describes her special trip to the North Pole last year.

    Longing to go to the North Pole, she always heard about it when she was young. Bi, now in her 60s, has at last realized the dream to see it for {#blank#}2{#/blank#} (she).

    “This dream was hidden in my heart by myself in the past. It gradually became dusty, but it never disappeared.{#blank#}3{#/blank#} I dreamed has finally come true.” Up to now, Bi {#blank#}4{#/blank#} (travel) to 73 countries worldwide. Besides the North Pole, she made a trip to Easter Island, which is around 3,700 kilometres off the western coast of Chile. In the same year, she went to the South Pole. And she intends {#blank#}5{#/blank#} (go) to other places in the near future.

    As a writer {#blank#}6{#/blank#} (show) a great interest in travel, Bi thinks traveling {#blank#}7{#/blank#} (be) a part of our life. She also believes it is {#blank#}8{#/blank#} only way to see different cultures and histories.

    “If the view is the same every day, we will easily become {#blank#}9{#/blank#} (bore). But if we go to a strange place, we will soon enter a condition of experiencing and thinking about different cultures. Travelling gives me much {#blank#}10{#/blank#} (free).”

    On October 23, 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.

    Jogging makes you burn fat and lose weight. In addition to increasing metabolism (新陈代谢), jogging is an {#blank#}1{#/blank#} (effect) way to burn more calories, {#blank#}2{#/blank#} helps you lose weight. If calories consumed in food are less than calories {#blank#}3{#/blank#} (spend) during exercise and other daily activities, you will lose weight. It is impossible not to! Many people have learned how to lose weight by{#blank#}4{#/blank#} (start) a running program.

    Jogging {#blank#}5{#/blank#} (help) to reduce stubborn fat. A running program can really help to cut back {#blank#}6{#/blank#} the last of your stubborn fat. Change can take a long time to come but {#blank#}7{#/blank#} (eventual) it makes maintaining a healthy weight much easier.

    If you suffer from poor appetite, jogging will improve your appetite. Along with all other {#blank#}8{#/blank#} (form) of exercise – the harder you work, the more you will eat {#blank#}9{#/blank#} (repair) your muscles and refuel them. When you start to run longer, you will start to eat to fuel your body, and may even find that you need to eat more food every day {#blank#}10{#/blank#} you did when you were overweight.

    Two new satellites of BeiDou Navigation(导航) Satellite System (BDS) {#blank#}1{#/blank#} (send) into space on a Long March-3D carrier rocket from the Xichang Satellite Launch Center in Sichuan Province, China at 2:07 a.m. on November 19, 2018. The satellites entered a Medium Earth orbit{#blank#}2{#/blank#} (safe) more than three hours later and will work with 17 other BDS-3 satellites already in space. They are also the 42^nd and 43^rd{#blank#}3{#/blank#} (member) of the BDS satellite family.

    China launched these satellites with {#blank#}4{#/blank#} aim of providing navigation services for countries and regions which participate in the Belt and Road Proposal by the end of 2018. “This is a key step for BDS developing {#blank#}5{#/blank#} a Chinese experimental system to a regional and then a {#blank#}6{#/blank#} (globe) navigation system,” said Yang Changfeng, chief designer of the BeiDou system. The positioning {#blank#}7{#/blank#} (accurate) of the BDS-3 system has been improved to 2.5 meters to 5 meters, said Yang.

    {#blank#}8{#/blank#} (name) after the Chinese term for the Plough, the BeiDou system has been serving China for 18 years {#blank#}9{#/blank#} another six BDS-3 satellites will be put into the Medium Earth orbit from 2019 to 2020. The system is expected {#blank#}10{#/blank#} (provide) first-class services around the globe by the end of 2020.

    The Dragon Boat Festival is a {#blank#}1{#/blank#}(tradition) holiday that commemorates the life and death of the famous Chinese scholar Qu Yuan.

    It is a day when many people eat zongzi and race dragon boats. In ancient  China,  the festival {#blank#}2{#/blank#} (celebrate) as "Poets' Day" in honor of Qu Yuan,  {#blank#}3{#/blank#} was known as China's first poet.

    {#blank#}4{#/blank#} is commonly believed that the local people began {#blank#}5{#/blank#} tradition of throwing sacrificial cooked rice into the river for Qu Yuan, while others hoped that the rice would prevent Qu Yuan's body from being eaten by the fishes in the river. At first, the locals decided {#blank#}6{#/blank#} (make) zongzi in hopes that it would sink into the river and reach Qu Yuan's body. However, the tradition of wrapping the rice in bamboo {#blank#}7{#/blank#} (leaf) to make zongzi began the following year.

    A dragon boat, usually made of wood to various designs and sizes, is a human-powered boat. They often have brightly decorated designs that range anywhere from 40 feet in length {#blank#}8{#/blank#} 100 feet, with the front end shaped like open-mouthed dragons, and the back end with a scaly tail. The boat can have up to 80 rowers to power the boat, {#blank#}9{#/blank#}depend) on the length. A sacred ceremony is performed before any competition in order to "bring the boat to life" by painting the eyes. The first team {#blank#}10{#/blank#} (gain) a flag at the end of the course wins the race.