In only fifty years, English{#blank#}1{#/blank#}(develop) into the language which is most{#blank#}2{#/blank#}(wide) spoken and used in the world. English is the working language of most international organizations, international trade and tourism. Businessmen and tourists often come to China without being able to speak{#blank#}3{#/blank#}. Chinese businessmen, taxi drivers and students talk with them using English. English is also the language of{#blank#}4{#/blank#}(globe) culture, such as popular music and the Internet. You can listen to English songs{#blank#}5{#/blank#}the radio{#blank#}6{#/blank#}use English to communicate{#blank#}7{#/blank#}people around the world through the Internet. With so many people{#blank#}8{#/blank#}(communicate) in English every day, it will become{#blank#}9{#/blank#}(important) to have{#blank#}10{#/blank#}good knowledge of English.

    No one could say that Katy Perry is an ordinary artist. Her songs are not just about sweet love and heartbreaks,{#blank#}1{#/blank#}usually have bigger themes. Take the songs Firework (2010) and Roar(2013) for example,{#blank#}2{#/blank#}Perry sings about being our own master and{#blank#}3{#/blank#}(discover) our true value. Earlier this year, she {#blank#}4{#/blank#} (announce) her new album (专辑) Witness, together with a new idea for W music Perry calls her new style “purpose pop”, meaning a{#blank#}5{#/blank#}(society) and political message. It seems that Perry has become tired{#blank#}6{#/blank#} simply encouraging people. Now, she wants to educate them politically as well. The best example of Perry's purposeful pop is{#blank#}7{#/blank#} (probable) the song Chained to the Rhythm, in which Perry criticizes the {#blank#}8{#/blank#} (behave) that people are unwilling to think more critically (批判的) about the world.

    But when it comes to the concept (概念) of purposeful pop, it is, in fact, something a lot of pop stars have been doing for a while. For example, Beyonce's 2016 song Formation deals with various problems such as an {#blank#}9{#/blank#} (argue) between white policemen and black citizens (公民) in the US,{#blank#}10{#/blank#} (hope) to create change through music.

    Chinese architecture is a style that has taken shape in East Asia over many centuries. The structural principles of Chinese architecture have remained largely {#blank#}1{#/blank#} (change), the main changes being only the decorative details. Since the Tang Dynasty, Chinese architecture  {#blank#}2{#/blank#} (have) a major influence {#blank#}3{#/blank#} the architectural styles of Korea, Vietnam, and Japan.

    The architecture of China is as old as Chinese civilization. From every source of information, there is strong {#blank#}4{#/blank#}(evident) that the Chinese have always enjoyed a native system of construction that has kept its principal characteristics from old times to the present day. Over the large area from Chinese Turkistan (突厥) to Japan, the same system of construction is popular and this is the area of Chinese cultural influence.

    Throughout {#blank#}5{#/blank#} 20th century, western-trained Chinese architects have tried {#blank#}6{#/blank#} (combine) traditional Chinese designs into modern architecture, with great success. Moreover, the pressure for urban development throughout contemporary China required higher speed of construction and higher floor area ratio (容积率),{#blank#}7{#/blank#} means that in the great cities the demand for traditional Chinese {#blank#}8{#/blank#} (build) has declined in favor of modern architecture. {#blank#}9{#/blank#} the traditional skills of Chinese architecture,{#blank#}10{#/blank#} (include) major and minor carpentry (木工), and masonry (石工), are still applied to the construction of vernacular architecture in the large rural area in China.

    Recently Lindsay hasn't felt herself. She was a really good student, but her grades {#blank#}1{#/blank#} (fall) since three months ago. This is because she sometimes has trouble {#blank#}2{#/blank#} (concentrate) on her study. She also refuses {#blank#}3{#/blank#} (talk) with teachers and friends. What's worse, she feels {#blank#}4{#/blank#}(tire)all the time but has difficulty in falling asleep. Her behavior attracts her mother's attention. Her mother asks her what {#blank#}5{#/blank#} (happen)to her, but she just cries.

    As a matter of fact, Lindsay is {#blank#}6{#/blank#} (suffer) from clinical depression(临床抑郁症).What is clinical depression? It can be described as a mood which is {#blank#}7{#/blank#} low that it affects your daily life {#blank#}8{#/blank#} (serious).The first signs of it in teens are {#blank#}9{#/blank#} (poor) school  reports  than before, learning difficulties and staying away from  classmates and teachers. {#blank#}10{#/blank#} you have these signs, don't worry. It is not so difficult to deal with clinical depression. There are many effective ways, such as medicine, small talk, more exercise and a balanced diet.