A sand storm often takes place in the northern China, {#blank#}1{#/blank#} is a kind of natural disasters. China usually experiences this kind of weather between February and May, while March and April see the most frequent and the {#blank#}2{#/blank#} (strong) sand storms. It becomes a very important environmental problem. It does damage {#blank#}3{#/blank#} the society as well as the environment. Firstly, the strong wind destroys soil and plant cover by {#blank#}4{#/blank#} (bury) fields with sand and dust. Secondly, by leaving too much dust in the air it will {#blank#}5{#/blank#}(serious) pollute the air. Thirdly, a sand storm will have {#blank#}6{#/blank#}bad effect on transportation. The dust in the air makes traffic and aircraft movements more difficult. And when the sand buries the roads, the traffic will{#blank#}7{#/blank#}(block). When plants in the farmland are buried, food supply will lose.

    Sand storms are another {#blank#}8{#/blank#}(punish) nature gives to mankind. We should not only take effective measures {#blank#}9{#/blank#}(stop) them, but also draw some {#blank#}10{#/blank#}(lesson) from them. We should not develop the economy (经济) at the cost of the natural environment.

    A new library in Tianjin-Tianjin Binhai Public Library-recently became {#blank#}1{#/blank#}online hit. The Daily Mail described it {#blank#}2{#/blank#}the “world's ultimate library”, while the word “breathtaking” was the {#blank#}3{#/blank#}(choose) of Newsweek magazine. One look at the library {#blank#}4{#/blank#}you'll see why. With its futuristic design and walls {#blank#}5{#/blank#}(fill) with books, it's the dream library of every book lover. But as the admiration    a burning question {#blank#}6{#/blank#} (die) in the back of our minds: When physical bookstores are closing down one by one, {#blank#}7{#/blank#}makes libraries free from the wave of digitalization? And do we really still need libraries now we've got the Internet in our hands?

    Reporter Ian Clark has the answer. “Libraries are not falling in importance - people are {#blank#}8{#/blank#}(simple) changing the way they use them,” he wrote on the Guardian website. We still need the physical space that a library provides. It's something that {#blank#}9{#/blank#}(call) a “third place”, according to the Seattle Times. This is a place in {#blank#}10{#/blank#}we can fully concentrate on our study and work without easily getting distracted.

    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?

    When you're a teenager, it's usual to feel like your parents are{#blank#}1{#/blank#}(constant) giving you a hard time, which makes you {#blank#}2{#/blank#}(confuse) However, maybe you should try putting yourself in their shoes once in {#blank#}3{#/blank#} while because, according to a recent study, parents with teenage children have a lot to put up{#blank#}4{#/blank#} . In the study, 2,000 parents of teenager children {#blank#}5{#/blank#} (ask) at which age their children had been hardest to raise. It turns out {#blank#}6{#/blank#} 14-year-old girls are the biggest source of parental stress. When {#blank#}7{#/blank#} (explain) why teenage girls were so hard to bring up, parents talked about their wildly-changing moods. Teenage boys were more likely to worry their parents by refusing to communicate properly. Most parents agreed that girls matured {#blank#}8{#/blank#} (fast) than boys, which makes girls harder{#blank#}9{#/blank#} (handle) due to their greater desire for independence. If you disagree with these {#blank#}10{#/blank#} (find), maybe you should reserve your judgment until you have teenage children of your own!

    When foreigners negotiate, or register in certain areas of China, they may be {#blank#}1{#/blank#}(surprise) at Chinese's special fondness and preference for seals. To Chinese, seals are an art of deep cultural roots, {#blank#}2{#/blank#} combines the essence of both calligraphy(书法) and sculpture and inspires generations to study, to appreciate and to collect.

    It is believed that seals came out as early {#blank#}3{#/blank#} 8,000 years ago after our ancestors could make pottery wares(陶瓷)and had private property. They were assumed to make marks on {#blank#}4{#/blank#}(they) own possessions to prevent them from being stolen. When the first dynasty {#blank#}5{#/blank#}(found),the king began to use seals to empower(授权)and to show lordly credits. Only the king's special seal was then called "Xi", {#blank#}6{#/blank#}(represent) the highest authority. The first emperor of China, Qin Shi Huang, had his "Xi"{#blank#}7{#/blank#}(make) out of the invaluable and beautiful jade "Heshi Bi".

    Then the local governments also needed seals for {#blank#}8{#/blank#} same function. Meanwhile, private seals were carved in a variety of lucky {#blank#}9{#/blank#}(character)and vivid animal patterns.{#blank#}10{#/blank#}(gradual). the sphragistics (印章学) came into being.

    The Hong Kong-Zhuhai-Macao Bridge, the world's{#blank#}1{#/blank#}(long) cross-sea bridge, enters the history of human engineering and connection as a point of pride upon {#blank#}2{#/blank#}(it) opening to traffic at 9 am on Oct.24, 2018.

    One day after the opening was announced at a ceremony{#blank#}3{#/blank#}(hold) in Zhuhai, the bridge's ports in three different administrative regions started serving travelers around-the-clock , opening 24 hours a day, seven days a week.{#blank#}4{#/blank#} (ensure) faster boundary crossings for passengers, the Macao and Zhuhai ports jointly use a one-off immigration clearance model,{#blank#}5{#/blank#}allows travelers to queue up only once to finish both exit and entry procedures of the two cities in about 30{#blank#}6{#/blank#}(second).

    Apart{#blank#}7{#/blank#}private cars, taxis and goods vehicles, two types of public transportation -shuttle bus(班车)and cross-boundary coach --can also run on the HZMB.{#blank#}8{#/blank#}frequency of shuttle buses is about 5-10minutes during peak hours. Booking tickets for the shuttle bus online in advance{#blank#}9{#/blank#}（be）available since 9 am on Tuesday. With the bridge now in service, the traveling time between Zhuhai and Hong Kong International Airport will{#blank#}10{#/blank#}(shorten) from four hours to 45 minutes, and the time between Zhuhai and Hong Kong's Container Terminals will be cut from 3. 5 hours to 75 minutes.