My feelings about science have{#blank#}1{#/blank#} (complete) changed. More than one science teachers at my new school {#blank#}2{#/blank#} excellent and {#blank#}3{#/blank#} (friend) . The science{#blank#}4{#/blank#} (facility) are very good with laboratories that have all the{#blank#}5{#/blank#} (late) equipment. Our chemistry teacher takes us to public science lectures about four times{#blank#}6{#/blank#} term, {#blank#}7{#/blank#} are always interesting, because the lecturers are famous at their area of science. In the last 20 years, seven Canadian scientists{#blank#}8{#/blank#} (win) the Nobel Prize. Now{#blank#}9{#/blank#} I'm becoming more and more interested in is physics and I want to study it at university. But my parents are {#blank#}10{#/blank#} (astonish), as they always thought I would become an English teacher.

    Graffiti (涂鸦) and street art are forms of art created on walls or public surfaces. This art is often considered illegal because it is done without the {#blank#}1{#/blank#} (permit) of the building owners. These art forms {#blank#}2{#/blank#} (exist) since the times of ancient Greece. But the more modem style began forming in the 1960s in the cities of New York and Philadelphia. “Graffiti” often appears as words- {#blank#}3{#/blank#} (usual) the names of the artist or their art crew. Graffiti artists write the words in {#blank#}4{#/blank#} (create) ways and with colorful spray-paint.

    “Street art” is more based {#blank#}5{#/blank#}images. Artists try to communicate a message through these images. Graffiti and street art can be controversial. They sometimes damage someone's property. Washington has tried to increase its fines for illegal graffiti, {#blank#}6{#/blank#}, however, is encouraging the creation of public art. America's capital city is trying hard {#blank#}7{#/blank#} (control) its illegal graffiti problem. At the same time, city officials recognize the value and importune or street art. There is {#blank#}8{#/blank#} high demand for more artists to make street art legally. But the city offers few {#blank#}9{#/blank#} (chance) for young D.C. street artists to develop their skills without {#blank#}10{#/blank#} (break) the law.

    The falling stars challenge, which began in Russia, invites participants{#blank#}1{#/blank#}(share) their best fake fall and recommend their friends to do the same, and people have been going to make their falls as dramatic as possible. At first, the falling stars challenge{#blank#}2{#/blank#}(regard) as a way for the wealthy to show their{#blank#}3{#/blank#}(possession). People were photographing themselves falling from cars, boats and even their own private jets,{#blank#}4{#/blank#}(lie) face-down with luxurious jewelry, expensive items from high-end brands surrounding them.

    However, as the challenge spread, it transformed from being a way of showing off to a creative way to show {#blank#}5{#/blank#}people consider important in their lives. The social media craze soon made{#blank#}6{#/blank#}(it) way to Weibo, a Chinese social media platform. A major difference with the Chinese version of the challenge {#blank#}7{#/blank#}(be) that professionals from different industries participated to show their daily routine. These include a firefighter lying in front of a row of fire trucks and {#blank#}8{#/blank#}officer at an emergency call center on the ground with documents thrown in all directions.

    While some pictures are intended {#blank#}9{#/blank#}fun online, Chinese authorities are taking it {#blank#}10{#/blank#} (serious). Some people who have participated in the trend have received tickets for breaking traffic laws to get the perfect photo.

    With the {#blank#}1{#/blank#}(develop) of industry, air pollution is getting more and more serious. In Beijing, many people suffer different kinds of illnesses because {#blank#}2{#/blank#} air pollution.

    Air pollution is caused by the following {#blank#}3{#/blank#} (reason): about half of the problem is caused by vehicles. There are more and more cars, buses on the roads, and they give off {#blank#}4{#/blank#} (harm) gases.25% of air pollution is caused by factories. Another factor is the smokers. Smoking not only does harm to their health {#blank#}5{#/blank#}to others. {#blank#}6{#/blank#} (beside) these, about 10% of air pollution is caused by other reasons.

    We should take some measures to fight {#blank#}7{#/blank#} pollution. New fuel can be used to take {#blank#}8{#/blank#} place of gas. We can plant more trees. If everybody realizes the {#blank#}9{#/blank#} (important) of the environment and does something to stop pollution, the problem will {#blank#}10{#/blank#} (solve).