If you go out to the fields at night in spring or summer, you can hear frogs singing{#blank#}1{#/blank#}(joy) here and there. It seems as if they were performing a field symphony（交响乐）.

    The frog is a good and useful creature that benefits human beings. They can catch fast-moving insects. Each frog eats a large number of pests that are {#blank#}2{#/blank#}(harm) to crops. This little creature is regarded {#blank#}3{#/blank#}“the natural enemy of pests”.

    {#blank#}4{#/blank#} now frogs are getting fewer and fewer. This is{#blank#}5{#/blank#}they are killed and put on the table as a delicious dish by their chief enemy, human beings. It is a shameless and cruel act, isn't it? Another reason responsible for the rapid reduction of frogs is {#blank#}6{#/blank#}farmers use insecticides (杀虫剂) to kill pests and frogs get {#blank#}7{#/blank#}(kill)as a result of drinking poisoned water or eating poison-killed insects.

    Something must be done without delay {#blank#}8{#/blank#}(save) frogs. If we don't punish those {#blank#}9{#/blank#}sell and kill frogs to make money, then one day all of us {#blank#}10{#/blank#}(punish) by nature for failing to keep the balance of nature.

    My American friend kindly invited me to her home to celebrate this year's Thanksgiving Day. I {#blank#}1{#/blank#} (experience) my first ever Thanksgiving.

    On that day, we watched the Thanksgiving parade (游行) in New York City on TV. My friend's family sat{#blank#}2{#/blank#}front of the television. They came from all over the States and enjoyed being together{#blank#}3{#/blank#} (look) at their happy faces, I thought it was really a holiday for families, just like the Mid-Autumn Festival in China.

    That evening, we had a big Thanksgiving dinner. This {#blank#}4{#/blank#}(tradition) meal includes roast turkey, mashed potatoes and assorted vegetables. When the dishes and plates arrived at the table, we started to take{#blank#}5{#/blank#} (turn) to say the things we were {#blank#}6{#/blank#}(thank) for. This, in fact, is a Thanksgiving tradition many families practice in the US.

    Then, the food {#blank#}7{#/blank#}(pass) around the table and we all ate far too much. I also had desserts with my dinner. There{#blank#}8{#/blank#}(be) different kinds of pies, such as apple pies, pumpkin pies and coconut pies.

    If one mentions Thanksgiving, one must talk about Black Friday, the Friday {#blank#}9{#/blank#}follows Thanksgiving Day. Shops across the United States will give their {#blank#}10{#/blank#}(big) sales of the whole year on Black Friday. Many people go crazy about it. I saw many long queues outside the shops on that day.

    According to Xinhua News Agency, the Palace Museum and Huawei signed a strategic cooperation agreement on March 15. The two sides will set an example {#blank#}1{#/blank#} 5G application.

    The Palace Museum received more than 17 million visitors in 2018, {#blank#}2{#/blank#}(make) it the most visited museum in the world. In the past 20 years, an office information network covering the whole museum {#blank#}3{#/blank#}(build) gradually. The museum has developed an App that provides an in-depth {#blank#}4{#/blank#}(explain) of cultural relic information and cultural services. Also, the museum has research on the application of VR, AR, AI and other {#blank#}5{#/blank#}(technique) in museums.

    {#blank#}6{#/blank#}signing of the agreement marks a new chapter in the strategic cooperation between the Palace Museum and Huawei Technologies Co. So, Huawei will make efforts {#blank#}7{#/blank#}(accelerate) the intelligent construction of the Palace Museum.

    "The 600-year-old Palace Museum has never been so close to science and technology," Shan Jixiang said {#blank#}8{#/blank#}(proud), director of the Palace Museum.

    Shan shared many ideas about the 5G Palace Museum. With the help of advanced technology, {#blank#}9{#/blank#}is expected that in the future, audiences around the world will be able to experience and visit the Palace Museum, whether it is a field trip or a virtual tour. Also, the use of AI technology provides a {#blank#}10{#/blank#}(broad) platform and stronger knowledge support for cultural relics among young people.