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 ourselves correctly with {#blank#}2{#/blank#} (confident) and without hesitation. Thirdly, 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 {#blank#}3{#/blank#} (grammatical) correct.

    There is no easy way to success {#blank#}4{#/blank#} language learning. {#blank#}5{#/blank#} good memory is a great help, but it is not enough only {#blank#}6{#/blank#}(memorize) rules from a grammar book. It is not much use learning by heart long lists of words and {#blank#}7{#/blank#} meanings, studying the dictionary and so on. We must learn by using the language. {#blank#}8{#/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 advice for those {#blank#}9{#/blank#} are studying a new language. Practice is important. We must practise speaking and {#blank#}10{#/blank#}(write) the language whenever we can.

用适当的介词或副词填空。

    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 Bing, the region governor, together with his son, decided t 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.

    Once upon a time a very strong woodcutter asked for a job in a timber merchant(木材商), and he got it. The pay was {#blank#}1{#/blank#}(real) good and so were the work conditions.  {#blank#}2{#/blank#} that reason, the woodcutter was determined to do {#blank#}3{#/blank#} best. His boss gave him an axe and showed him the area, {#blank#}4{#/blank#} he was supposed to work. The first day, the woodcutter {#blank#}5{#/blank#} (bring) 18 trees. "Congratulations," the boss said. "Go on that way". Very {#blank#}6{#/blank#}(motivate) by the boss's words, the woodcutter tried harder the next day, {#blank#}7{#/blank#} he could only bring 15 trees. The third day he tried even harder. But he could only bring 10 trees. Day after day he was bringing less and less trees. "I must be losing my {#blank#}8{#/blank#}(strong), " the woodcutter thought. He went to the boss and apologized, {#blank#}9{#/blank#}(say) that he could not understand what was going on. "When was the last time you sharpened your axe? " the boss asked. "Sharpen? I had no time to sharpen my axe. I have been very busy {#blank#}10{#/blank#}(try) to cut trees. "

    China is leading the world in facial recognition algorithms（人脸识别算法）. It is reported that its best algorithm can recognize l0 million people {#blank#}1{#/blank#} a single mistake in less than a second.

    The top five of the 39 facial recognition algorithms in the word come from China, according to a test, {#blank#}2{#/blank#} released the results for 2018 last Friday. YITU Technology, {#blank#}3{#/blank#} Shanghai-based company that claimed both the top and second spot on the list, said that its top algorithm is able {#blank#}4{#/blank#} （recognize）nearly every person in a sample base of 10 million. However, "it is very likely for a human brain to make {#blank#}5{#/blank#} （mistake） in recognizing the identities of 100 people," the company said. Algorithms from Beijing-based company Sense Time {#blank#}6{#/blank#} （win） the third and fourth spot, while the Shenzhen Institutes of Advanced Technology（SIAT）claimed {#blank#}7{#/blank#} （five） in the test. YITU said that high facial recognition accuracy（精确）means that users gain {#blank#}8{#/blank#} （good） experiences when {#blank#}9{#/blank#} （use） related products. For example, when a user uses facial ID for payment on a smartphone, it will not authorize the payment for someone else with a similar {#blank#}10{#/blank#} （appear）as the user, the company noted.