That Beijing, together with Zhangjiakou, succeeded in getting the chance to host the 2022 Winter Olympic Games, speeds up the development of Zhangjiakou City. Word came {#blank#}1{#/blank#}the Beijing-Zhangjiakou high-speed railway, {#blank#}2{#/blank#}(locate) in North China, is currently under construction, and {#blank#}3{#/blank#}(expect) to be completed by 2020 in preparation for the cities to host the 2022 Winter Olympics. Starting from Beijing North Railway Station, heading west through the Great Wall three times in the capital's territory, the project is a big challenge, {#blank#}4{#/blank#} designers say the explosions needed to dig the tunnels will not have an impact on the structure. The line has a {#blank#}5{#/blank#}(long) of 174 km as a double tracked passenger dedicated line, with ten stations situated along its route. Having a {#blank#}6{#/blank#}(totally) investment of 31.17 billion yuan ($5 billion), the trip between the two cities will only take 40 minutes, with the train {#blank#}7{#/blank#}(travel) at an average of 250 km/h. According to the plan, the high-speed railway will build two branch lines—one is to Yanqing Station and the other {#blank#}8{#/blank#} Taizicheng of Chongli, {#blank#}9{#/blank#} the Olympic village lies. The full railway, which includes 70-kilometer section through Beijing, will be completed in four and {#blank#}10{#/blank#} half years.

    In order to know a foreign language thoroughly, four things are necessary. Firstly, we must understand the language when we hear {#blank#}1{#/blank#} spoken. Secondly, we must be able to speak it correctly with confidence and without hesitation. {#blank#}2{#/blank#}, we must be able to read the language,and fourthly, we must be able to write it. We must be able to make sentences that are grammatically correct.

    There is no easy way to success {#blank#}3{#/blank#} language learning. {#blank#}4{#/blank#} good memory is of great help, but it is not enough only {#blank#}5{#/blank#} (memorize) rules from a grammar book. It is not much use learning by heart long list of words and {#blank#}6{#/blank#}  meaning, studying the dictionary and so on. We must learn by using the language. {#blank#}7{#/blank#} we are satisfied with only a few rules we have memorized, we are not really learning the language. "Learn through use" is a good piece of {#blank#}8{#/blank#}  (advise) for those {#blank#}9{#/blank#} are studying a new language. Practice is important. We must practice speaking and {#blank#}10{#/blank#} (write) the language whenever we can.

    Ski touring is exactly that—touring on skis. It combines {#blank#}1{#/blank#} best bits of skiing and mountaineering and provides the perfect way {#blank#}2{#/blank#} (explore) the mountain in winter. The {#blank#}3{#/blank#} (advantage) of ski touring are that you can really escape the crowds, enjoy the peace of the mountains and {#blank#}4{#/blank#} (reward) with breathtaking views and exciting descents.

    Ski touring involves both going up and down the mountain; both of {#blank#}5{#/blank#} (they) present challenges and new skills are to be acquired. There is much to learn about getting up the mountain that improves efficiency and saves energy. {#blank#}6{#/blank#} (similar) ，you want to be prepared to enjoy going down, which means learning to deal with the variety of snow conditions you will face. Because all ski touring is very demanding, you must be {#blank#}7{#/blank#} good physical condition. The fitter you are, the {#blank#}8{#/blank#} (much) fun you will have.

    Rapidly changing conditions and the human factors are the primary reasons for accidents. The human factors include stress, poor {#blank#}9{#/blank#} (communicate), over-confidence and tiredness. You should always ski within the limits of your ability, and make sure you know {#blank#}10{#/blank#} to navigate (导航) properly with map and compass.

China successfully landed the Chang'e 4 lunar probe (月球探测器) on the far side of the moon on January 3, 2019, becoming the only country in history  {#blank#}1{#/blank#} (touch) the lunar surface unseen by those on Earth. The far side of the moon has been seen and mapped {#blank#}2{#/blank#}(previous) by astronauts of the Apollo missions. But it is the first time that the moon's far side{#blank#}3{#/blank#}(set) foot on by spacecraft, and the successful landing of Chang'e 4 is seen as a major milestone in space{#blank#}4{#/blank#}(explore).

The Chang'e 4 spacecraft consists{#blank#}5{#/blank#}two parts: a lander and a rover (巡视器). Representing China's{#blank#}6{#/blank#}(new) step in the lunar probe project of all time, it landed at 10: 26 am of Beijing time. Then it sent back a photo of the landing place.{#blank#}7{#/blank#}(shoot) through cameras on the probe's lander, the photo marks the world's first image taken on the surface of the far side of the moon. One of the photos published by the China National Space Administration shows the place{#blank#}8{#/blank#}Chang'e 4's rover — named Yutu 2 — will be heading hours later for{#blank#}9{#/blank#}purpose of conducting further research. The name Chang'e has its roots in the Chinese goddess of the moon. In the ancient tale, Chang'e{#blank#}10{#/blank#}(fly) to the heavens and landed on the moon as her final resting place.