Whether enveloped by the thick smog from factories or unseen poisons from vehicle waste gases, many cities around the world are losing the battle against air pollution．

    Somewhere, many people died from breathing in the smoke and harmful gases {#blank#}1{#/blank#} (pour) into the air．In China and India, the damage of this poisonous air is particularly alarming, {#blank#}2{#/blank#}(cause) three million deaths in those two countries．As a result, some out-of-breath citizens are turning to bottled air．

    Many companies are compressing fresh countryside air into bottles and {#blank#}3{#/blank#} (sell) it online．It sounds like a joke but the idea is to raise {#blank#}4{#/blank#}(aware) and it provided people {#blank#}5{#/blank#}fresh air at a price．One such company is Vitality, {#blank#}6{#/blank#} collects air from the Canadian Rockies and compresses it into container．Vitality started the business to sell the canned air as joke gifts at first．{#blank#}7{#/blank#} the products took off in a {#blank#}8{#/blank#} ( surprise) way then．So, the manager came up with the business idea {#blank#}9{#/blank#} they can sell fresh air over the world．The manager of the company  has  made {#blank#}10{#/blank#}clear that China, India and South Korea have become its main markets．

    Chinese President Xi Jinping has praised a group of middle school students for their efforts in satellite design. He said he was pleased with their curiosity and bravery in {#blank#}1{#/blank#}(science) exploration. The president also wished the teachers and students in Bayi School {#blank#}2{#/blank#}happy new year.

    Xi made the praise in a letter {#blank#}3{#/blank#}(write) to the students in Beijing's Bayi School on Saturday. A small satellite designed and developed by them {#blank#}4{#/blank#}(send) into space last Wednesday at Taiyuan Satellite Launch Center {#blank#}5{#/blank#} it was designed to operate in orbit (轨道) for 180 days.

    Three months ago, Xi returned to his high school, to visit a laboratory and talk to teachers and students {#blank#}6{#/blank#}were designing the small satellite. The president said he was {#blank#}7{#/blank#} (extreme) glad to know that the satellite designed by the students would be launched and called on them to become {#blank#}8{#/blank#}(build) of the country. Xi warmly encouraged the students {#blank#}9{#/blank#}(study) science and contribute to the development of China. He hoped that the students would keep hungry for knowledge and develop {#blank#}10{#/blank#}(they) national spirit.

    Just now, I entered the website "Topic for Today". I feel{#blank#}1{#/blank#}(interest) in the report on middle school students' using cell-phones on campus. In fact，more students now come to school{#blank#}2{#/blank#} cell-phones. My schoolmates have different opinions. Some think{#blank#}3{#/blank#}is convenient to get in touch with others with the cell-phone,{#blank#}4{#/blank#}also makes them feel safe especially in time of trouble. Besides，it is nice to enjoy{#blank#}5{#/blank#}(variety) functions of different cell-phones.

    Others think differently. First，the cell-phone is not{#blank#}6{#/blank#}must in school，as there are some IC phones there,{#blank#}7{#/blank#}(make) it easy to call others. Second, many students often play e-games and send{#blank#}8{#/blank#}(message) with their cell-phones, even in class, which will surely have bad effects on their study. What's more, a large amount of time and money will{#blank#}9{#/blank#}(waste).In my opinion, the cell-phone is a useful tool in our daily life. But it doesn't mean we can use it {#blank#}10{#/blank#}(free) in school.

    A few months after returning the US from Germany, I took part in a college course in French. Since I had learned to speak German good in Germany, I thought that it might be interested to begin studying another language.

    What makes the sea tum red and causes thousands of fish to die？As far back as anyone could remember, the blame was placed on the "red tides." In 1947, scientists finally connected the red tides with a microscopic sea organism(有机体){#blank#}1{#/blank#}(call)the dinoflagellate.

    The dinoflagellate is so tiny {#blank#}2{#/blank#} 6, 000 of these organisms may be contained in {#blank#}3{#/blank#} single drop of water. It stands on the borderline between plant and animal in its classification, it produces its own food, as plants do. But it moves {#blank#}4{#/blank#}(free)and eats other organisms, as animals do.

    Dinoflagellates are normally only one of the many kinds of organisms found in plankton. Plankton is the name given to all very small {#blank#}5{#/blank#}(form)of sea life. However, when the air and water {#blank#}6{#/blank#}(be)calm and warm, dinoflagellates multiply with {#blank#}7{#/blank#}(amaze)sped. The surface of the water appears {#blank#}8{#/blank#}(cover)with a red carpet.

    The dinoflagellates give off a poison. Many fish die. Their bodies are washed up on the beach. Beaches are not fit {#blank#}9{#/blank#} any use. Fish that are not killed may become {#blank#}10{#/blank#}(poison)to animals or people who eat them. Commercial fishing comes to a stop.

    As dinoflagellates consume all the food and oxygen in an area, they die. After a time, the sea returns to normal. But when conditions are right, the red tide comes again.

Getting around the city when you are six months pregnant and have a two-year-old girl can be really {#blank#}1{#/blank#} (challenge). One spring afternoon, we went to one of the grocery {#blank#}2{#/blank#}(store) nearby to buy some food. There was no sign of rain {#blank#}3{#/blank#} the store was just around the corner, so we went there without an umbrella. However, when we were about to leave the store) the rain came in full force and the streets {#blank#}4{#/blank#} (cover) with water within minutes.

I noticed a young Chinese couple staring at {#blank#}5{#/blank#} (we) when we came to a crossroad and were waiting for the light to change {#blank#}6{#/blank#} (patient). I figured they were probably wondering {#blank#}7{#/blank#} a pregnant foreigner was dragging her little kid out through the rain. But as we crossed the street, the woman offered me her umbrella. I declined but she handed it to me and hurried off with her husband.

Though {#blank#}8{#/blank#} (catch) in the rain unexpectedly, we still treasure {#blank#}9{#/blank#} memory and will remember the warmth and{#blank#}10{#/blank#} (kind) of the Chinese couple forever.