Alexander Graham Bell was an influential scientist, engineer and {#blank#}1{#/blank#}(invent). He was born on March 3, 1847 in Edinburgh, Scotland. He is widely credited with the invention of the first telephone. Bell's mother and wife{#blank#}2{#/blank#}(be)both deaf, which had an effect{#blank#}3{#/blank#}his work.

    When he was 23, Bell and his parents moved to Canada. Bell studied the human voice and worked with different schools for{#blank#}4{#/blank#}deaf. He experimented with sound, working with sound, working with equipment used to send different{#blank#}5{#/blank#}(message)and record sound. He worked on acoustic telegraphy(声报机)with an electrical designer {#blank#}6{#/blank#}(name)Thomas Watson.

    On February 14, 1876, Bell and Elisha Gray, an American electrical engineer, both filed patents(申请专利)covering the transmission (传送)of sounds telegraphically. Finally, Bel{#blank#}7{#/blank#}(give)the patent. A few days{#blank#}8{#/blank#}(late), he succeeded in{#blank#}9{#/blank#}(get)his telephone to work.

    Bell improved the design and by 1886 more than 150,000 people owned telephones in the United States. He once said, “The day will come when the man at the telephone will be able to see the distant person to {#blank#}10{#/blank#}he is speaking.”

    Kids who use media in unhealthy ways may have problems {#blank#}1{#/blank#}relationships, conduct and other emotional symptoms, lead author of a US new study warned.

    A study of the University of Michigan (UM){#blank#}2{#/blank#} (release) recently on its website found that how children use the devices, rather than how much time they spend on them,{#blank#}3{#/blank#} (be) the strongest predictor of emotional or social problems connected with screen {#blank#}4{#/blank#}(addict ).

    The study revealed that {#blank#}5{#/blank#}matters most is whether screen use causes problems in other areas of life or has become{#blank#}6{#/blank#}all-consuming activity.

    Some of the warning {#blank#}7{#/blank#} (sign) include: if screen time interferes with daily activities, causes conflict for the child or in the family, or is the only activity {#blank#}8{#/blank#}brings the child joy. Though much research{#blank#}9{#/blank#} (exist) on adolescents and screen use, this is considered as the first tool to measure how addicted children are to screen media. It will be a{#blank#}10{#/blank#} (value) tool for parents, clinicians and researchers.

    Tea is one of the most popular {#blank#}1{#/blank#}(drink) in the world. You make it by pouring hot water over the {#blank#}2{#/blank#}(dry) leaves of a tea plant. For centuries people believed that tea could cure illnesses, and they used it as medicine. Today scientists know that tea contains chemicals that prevent cells from {#blank#}3{#/blank#}(die). Most teas have caffeine in them, a substance that makes you feel more active. Some people have problems drinking tea because it can cause {#blank#}4{#/blank#}(sleep).

    The tea plant grows best in tropical and temperate places {#blank#}5{#/blank#} rain falls throughout the year. Tea plants can be grown from sea level {#blank#}6{#/blank#} about 2,000 meters above sea level, but the best quality grows in higher regions.

    Tea{#blank#}7{#/blank#}(come) from the leaves and buds of tea plants. Wild plants can be up to 9 meters high but on tea plantations they {#blank#}8{#/blank#}(cut) back to a bush of about a meter in height so that workers can pull the leaves {#blank#}9{#/blank#}(easy). It takes a plant tree to five years before it is ready for picking.

    A picker can harvest about 20 kg of tea a day. On large tea plantations the leaves are harvested by machines,{#blank#}10{#/blank#} the quality of tea is higher when the leaves are picked by hand.

    Life has become difficult for many villages, and some are disappearing. There are a number {#blank#}1{#/blank#} reasons for this. Firstly, young people from villages usually want to live somewhere livelier and they often move to the towns and do not return. Secondly, people move to the cities to find work, as there are often very few jobs in the countryside. Sometimes villages remain {#blank#}2{#/blank#} people from the cities have bought a "second home" in the village, {#blank#}3{#/blank#}they come and stay at weekends. The price of houses {#blank#}4{#/blank#}(go) up and people from the area cannot afford {#blank#}5{#/blank#}( buy) a house there. Another problem is that it is becoming more and more difficult for farmers to make money from the farms. So they sell their land and find another job.

    These days, modern buildings are everywhere. But if you want to see{#blank#}1{#/blank#}life was back in the old days, China still has many beautiful water{#blank#}2{#/blank#}(town) to visit. CNN has chosen four of the country's most beautiful ones.

    The village of Zhouzhuang in Jiangsu calls{#blank#}3{#/blank#}(it) "the oldest water town in China". The village, which{#blank#}4{#/blank#}(build) in 1086, is crossed with canals. Taking a boat ride through town, the red lanterns might make you think of China's romantic past.

    Hongcun,{#blank#}5{#/blank#} (fill) with lakes and beautiful Anhui-style buildings, is 900 years old. It was built to look like a big ox. Huangshan Mountain is the head; the town is the body and the bridges are legs.

    Fenghuang in Human doesn't look like a bird,{#blank#}6{#/blank#}its name means "phoenix" (凤凰) in Chinese. The town is as beautiful as the{#blank#}7{#/blank#}(magic) bird. The stilted (吊脚的) buildings on each side of the Tuojiang River make the area look like a scene from{#blank#}8{#/blank#}postcard.

    While most water towns are in the south, Shangdong's Tai'erzhuang stands out in the north. The town{#blank#}9{#/blank#}(be) on the bank of the Beijing-Hangzhou Grand Canal. In the town, there are ancient bridges, a canal and temples,{#blank#}10{#/blank#} (make) you think of its past glory.

    Chinese communities around the world welcomed the Year of the Pig {#blank#}1{#/blank#} February 5th. Celebrations took place across the globe, ranging from Southeast Asia's centuries-old Chinese communities to the more recently {#blank#}2{#/blank#} (establish) Chinatowns. In the streets of several European {#blank#}3{#/blank#} (city), performances of dragon dances and lion dances drew huge crowds of people. Celebrations in London are expected {#blank#}4{#/blank#} (last) a month with series of activities, {#blank#}5{#/blank#} is the biggest Chinese New Year celebration outside Asia.