A boy trembled in the cold winter, wrapping his arms wound {#blank#}1{#/blank#}(he) on a bus stop bench. He wasn't wearing warm clothes and the temperature was -10℃.{#blank#}2{#/blank#} a heartbreaking scene it was! But the good deeds of the ordinary people {#blank#}3{#/blank#}witnessed the 11-year-old Johannes were both joyous and inspiring. A woman, {#blank#}4{#/blank#} (sit) next to the boy, discovered he was on a school trip and was told to meet his teacher at the bus stop. She {#blank#}5{#/blank#} (selfless) covered his shoulders with her own coat.{#blank#}6{#/blank#} (late), another woman at first gave him her scarf, and then wrapped him in her large jacket. Throughout the day, more and more people offered Johannes their gloves and even the coats off their backs.

    Actually, it was a {#blank#}7{#/blank#}(hide) camera experiment by Norwegian charity SOS Children's Village as part of their winter campaign to collect {#blank#}8{#/blank#} (donate) to help Syrian children get through the winter. Synne Ronning, the information head of the organization, also {#blank#}9{#/blank#}（note） that the child was a volunteer who was never {#blank#}10{#/blank#}any danger during the filming.

    Easter Island, or Rapu Nui as it is known {#blank#}1{#/blank#} (local), is home­ to several hundred ancient human statues. After this remote Pacific island was settled by the Polynesians(波利尼西亚人), it remained {#blank#}2{#/blank#}(abandon) for centuries. All the resources that went into the statues, some of {#blank#}3{#/blank#}are ten metres tall and weigh over 7,000 kilos , came from the Island itself . Yet when Dutch adventurers landed in 1722, they met a Stone Age culture. The statues {#blank#}4{#/blank#}（carve）with stones tools, then transported for many kilometers, without the use of animals or wheels, {#blank#}5{#/blank#}the large stone platforms. The identity of the statues builders was in doubt until well into {#blank#}6{#/blank#}twentieth century. Thor Heyerdahl, the Norwegian {#blank#}7{#/blank#}(explore) , thought the statues had been created by the people from Peru. Bestselling Swiss author Erich Daniken believed they were built by aliens.Local folklore（民俗） believ Modern science has proved that the statues builders were Polynesians, but not proved {#blank#}8{#/blank#} they moved their creations. that the statues walked there {#blank#}9{#/blank#}(they), while researchers have tended to assume the ancestors dragged the statues there, {#blank#}10{#/blank#}(use) ropes and logs.

    Dujiangyan is the oldest man-made water system in the world, and a wonder in the development of Chinese science.{#blank#}1{#/blank#}(build) over 2, 200 years ago in what is now Sichuan Province in Southwest China, this amazing engineering{#blank#}2{#/blank#}(achieve) is still used today.

    In ancient times, the region in which Dujiangyan now stands{#blank#}3{#/blank#}(suffer) from regular floods caused by overflow from the Minjiang River.{#blank#}4{#/blank#}(help) the victims of the flooding, Li Bing, the region governor, together with his son, decided to find a solution. Li designed a series of channels built at different levels along Mount Yulei that would take away the floodwater while leaving the river flowing naturally. {#blank#}5{#/blank#}(good) still, the extra water could be directed to the dry Chengdu Plain, making {#blank#}6{#/blank#}suitable for farming.

    Once the system was finished, no more floods occurred and the people were able to live {#blank#}7{#/blank#} (peaceful). Today, Dujiangyan is admired by scientists from around the world because of one feature. Unlike modern dams{#blank#}8{#/blank#} the water is blocked with a huge wall, Dujiangyan still lets water flow through the Minjiang River naturally,{#blank#}9{#/blank#} (enable) ecosystem(生态系统) and fish populations to exist {#blank#}10{#/blank#}harmony.

Meet Alexa, Your Digital Roommate

    Who is Alexa? She is a digital assistant that is part of the voice-activated Echo Dot "smart speaker" produced by Amazon. This year Saint Louis University in Missouri has placed one of the speakers in every dorm room {#blank#}1{#/blank#} its campus. Students can ask the virtual assistant anything from "When are the football teams playing?" to "What's the square root of 1440?"

    SLU student Brendan McGuire said: "Instead of searching on the Internet while I {#blank#}2{#/blank#} (tap) away at my computer, I can just ask Alexa: Hey Alexa, ask SLU what's the molecular(分子的)weight of water? And I can have the answer without {#blank#}3{#/blank#}(interrupt) my process." That's exactly {#blank#}4{#/blank#} school officials had in mind when they decided to provide the smart speakers free of charge for students.

    "The students we attract {#blank#}5{#/blank#} (drive) to achieve success in and out of the classroom," David Hakanson, SLU's vice president, said. "Every minute we can save our students from having to search for the information online is another minute {#blank#}6{#/blank#} (commit) to their education."

    Saint Louis University is the first in the U.S. {#blank#}7{#/blank#} (include) an Echo Dot smart speaker in every campus living space. Other colleges have also found ways to offer the technology to students. This year Northeastern University in Boston installed 60 speakers in public places {#blank#}8{#/blank#} students could get answers to common questions.

    At Arizona State University, engineering students living in the brand-new residence hall have the option of adding an Amazon Echo Dot to their rooms. "Our focus is putting this technology into the hands of our students in a way{#blank#}9{#/blank#} will build an ecosystem. {#blank#}10{#/blank#} supports voice technologies throughout the ASU campus," said Heredia, a director at ASU.

    Robot teachers are now very popular with pupils in some primary schools in South Korea. Compared with human teachers, the robot teachers are {#blank#}1{#/blank#} (patient). They never get angry and are always kind to the students. That's {#blank#}2{#/blank#} the children can always get on well with their robot teachers.

    English-teaching robots {#blank#}3{#/blank#} (send) to three primary schools for eight weeks last December. {#blank#}4{#/blank#} (equip) with a microphone and video camera, the robots teach students as teachers. Researchers found that the English-teaching robots helped raise students' interests in the language and build up their {#blank#}5{#/blank#} (confident). More and more students came to like studying and they got better grades in exams. Meanwhile, other robot teachers, {#blank#}6{#/blank#} can teach math, science and art, have also been developed.

    Many people think these robot teachers should be used {#blank#}7{#/blank#} faraway village schools so that the children there can also receive a good education. {#blank#}8{#/blank#} (give) rural school children more learning chances, the South Korean government has expressed great interest in {#blank#}9{#/blank#} (develop) these robots. No doubt there will be more and more robot teachers working with students. Perhaps they will {#blank#}10{#/blank#} (complete) replace human teachers one day in the future. Who knows?