I am taught by many teachers in my school. Every subject has a {#blank#}1{#/blank#} (differ) teacher, but I like my math teacher {#blank#}2{#/blank#}(well).Her name is Lakshmi but we usually call her Ma'am. She is our class teacher too.

    Ma'am {#blank#}3{#/blank#} (join) us last term. She is very kind and her way of teaching is so{#blank#}4{#/blank#} (interest) and simple that we all can understand everything {#blank#}5{#/blank#} is being taught and how it can be done. Most {#blank#}6{#/blank#} (important), Ma'am teaches math with lots of patience. If we do not understand a problem, she will spend extra time guiding us until we understand it. And we can go to her at any time during school hours for help.

    She also helps us {#blank#}7{#/blank#}activities at school. When there is some kind of programs, she will be there {#blank#}8{#/blank#}(help) us to get ready for the show. Even when we go on picnics, she takes good care of {#blank#}9{#/blank#}.

    To me, Ma'am is not only {#blank#}10{#/blank#} good teacher, but also our best friend. I love Ma'am and I wish her a happy life.

    Xuan paper, known as one of the Four Treasures of Study, first came into {#blank#}1{#/blank#} (exist) in Xuan Prefecture in the Tang dynasty. The traditional skill of making the paper {#blank#}2{#/blank#} hand has been passed down through generations. The process takes as many as 100 steps, all of {#blank#}3{#/blank#} require a level of delicacy.

    Take papermaking master Zhou Donghong for example. He uses a fine screen to filter（过滤） a mixture of water and fibers. He lifts it up, and it's a sheet of paper. It takes him and his partner only 15 seconds {#blank#}4{#/blank#} (form) and shape it, but they've devoted {#blank#}5{#/blank#} (them) to perfecting the skills for decades.

    “There are a lot of tricks of filtering the fibers, and timing is the {#blank#}6{#/blank#} (difficult) part of all. We have only one chance to filter the right amount of fibers, and only the proper weight guarantees the paper is neither too thin nor too thick, and the margin for error is {#blank#}7{#/blank#} (extreme) small,” said Zhou. With just the right degree of thickness, top quality Xuan paper holds ink and water tightly.

    The skill of papermaking, {#blank#}8{#/blank#} (recognize) as a national treasure, has also proven to be an international one. We felt {#blank#}9{#/blank#} great sense of pride as it was listed as a world intangible culture heritage(非物质文化遗产) by UNESCO in 2009. Since then, in Jingxian County, Xuan papermaking {#blank#}10{#/blank#} (teach) in schools.

    Each year{#blank#}1{#/blank#}(thousand) of tourists visit the polar regions of the Arctic and Antarctica. But the increasing number of people traveling to the ends of the Earth can have{#blank#}2{#/blank#}negative effect on fragile ecosystems. Should tourists{#blank#}3{#/blank#}(allow) to visit polar regions?

    About 40,000 tourists visit Antarctica each year. More than five million travel to the Arctic and sub-Arctic. Transporting tourists to the regions{#blank#}4{#/blank#}(increase) ship and airplane traffic, adding to the risk of pollution, oil spills, and other {#blank#}5{#/blank#}(environment) damage. Because the places where wildlife is accessible{#blank#}6{#/blank#}(be) few in number, tourist traffic can become concentrated in specific areas,{#blank#}7{#/blank#} (put)Arctic vegetation(植被) at risk.

    Others say that access{#blank#}8{#/blank#}these very special parts of the world should not be restricted to only researchers and scientists. Polar tourism allows people to develop deep {#blank#}9{#/blank#}(person) connections with polar regions. "Those{#blank#}10{#/blank#}travel to the Arctic or Antarctica often become cheerleaders for supporting those places." Jim Sano, vice president for travel and conservation at World Wildlife Fund, told TFK.

    Chinese researchers have planned to build an airport in Antarctica in November. The Chinese {#blank#}1{#/blank#} (be) not very used to flying to the southernmost continent, because the country s first polar plane, the Snow Eagle 601, {#blank#}2{#/blank#} (put) into use only three years ago.

    Before the Snow Eagle 601, Chinese researchers traveled to the ice-covered land by ship, which took significantly {#blank#}3{#/blank#} (long) than flying. There are currently more than 20 airports in Antarctica, but none of them belong to China. The Snow Eagle 601 has to rely on Russian airports {#blank#}4{#/blank#} (take) off and land. That's {#blank#}5{#/blank#} the Chinese researchers decided to build their own. Building an airport in Antarctica is very different from building one elsewhere. The continent is covered by a {#blank#}6{#/blank#} (constant) moving layer of ice, so the builders must find somewhere that moves at the slowest possible pace and in a {#blank#}7{#/blank#} (fix) direction.

    The builders managed to find a spot back in early 2017 following {#blank#}8{#/blank#} tough measuring process that took place in the storm-like polar winds. The next problem is the snow. The soft nature of snow makes {#blank#}9{#/blank#} a bad material for a runway. So the builders must use road roller-like {#blank#}10{#/blank#} (machine) to press the snow, which can be very time-consuming in extreme coldness.

    The annual Ice and Snow Sculpture Festival is Harbin's main tourist highlight. It is the world's biggest winter festival. The {#blank#}1{#/blank#}(bitter) cold winters are just right for this festival.

    {#blank#}2{#/blank#}sets the Harbin festival apart is the scale and size of the sculptures and the{#blank#}3{#/blank#}(beauty) lighting. It is bigger than {#blank#}4{#/blank#} ones in Sapporo, Norway, and Quebec.

    At first, mainly Chinese{#blank#}5{#/blank#}(participate), but in the last decade, it has become an international festival and {#blank#}6{#/blank#}(compete). As the festival grows in international participation, and as China's economy grows, the size of the snow sculptures and ice architecture exhibits keeps {#blank#}7{#/blank#}(grow) The work going into making these exhibits is astounding, and their size and beauty is amazing.

    The lightning {#blank#}8{#/blank#}(effect)on the huge ice sculptures in the Ice and Snow World are technologically complex.

    Officially the festival {#blank#}9{#/blank#}(hold) from the end of December through February. Opening dates keep changing, and ending dates partly depends {#blank#}10{#/blank#} the weather.

    The Sun Island Scenic Area will be opened from Dec. 21 to Feb. 28.