It is not a secret {#blank#}1{#/blank#} trees are vital to our life. They provide us with food, wood and most {#blank#}2{#/blank#} (important), oxygen. Now there is one more thing we can add to this list—blocking out harmful bacteria from water.

    The discovery {#blank#}3{#/blank#} (make) by a team {#blank#}4{#/blank#} (consist) of scientists from the Massachusetts Institute of Technology (MIT) and high school students {#blank#}5{#/blank#} were seeking a natural water filter(过滤)—one that would help communities in developing countries that do not have {#blank#}6{#/blank#} (accessible) to modern water filter systems.

    The {#blank#}7{#/blank#} (research), led by Professor Rohit Karnik, decided to turn{#blank#}8{#/blank#} trees for help, because they could allow liquid to flow through, while blocking out air bubbles.

    They began by cutting 1.5-inch-wide sections of tree bark from the branches of a white pine tree. The people related then tested the wood's filtering ability by pouring water containing red dye particles of different sizes through. To their {#blank#}9{#/blank#} (amaze), they found that it was effective in trapping all the particles. Greatly {#blank#}10{#/blank#} (encourage), the team conducted another experiment, this time with water that contained bacteria. Sure enough, the sapwood held back 99% of the bacteria, allowing only 1% to flow through.

    Spring Festival is the most important of the traditional Chinese holidays. It is often inaccurately {#blank#}1{#/blank#} (call) “Lunar New Year”, because—as part of the lunisolar Chinese calendar (农历)-the date is partially determined based on lunar phase (月相). The festival traditionally {#blank#}2{#/blank#} (begin) on the first day of the first month in the Chinese calendar and ends with Lantern Festival{#blank#}3{#/blank#} is on the 15th day. Chinese New Year's Eve, a day when Chinese families gather for their annual reunion dinner, is known as chú xī. It literally means “Year-pass Eve”.

    According to {#blank#}4{#/blank#} (tale) and legends, the beginning of Chinese New Year started with the fight against {#blank#}5{#/blank#} mythical beast (神兽) called Nien (年). Nien would come on the first day of New Year to devour livestock (牲畜), crops, and even villagers,{#blank#}6{#/blank#} (especial) children. To protect {#blank#}7{#/blank#}the villagers would put food in front of their doors at the beginning of every year. It was believed that after the Nien{#blank#}8{#/blank#} (eat) the food they prepared, it wouldn't attack any more people. One time, people saw that the Nien was scared away by a little child wearing red. The villagers then understood that the Nien was afraid {#blank#}9{#/blank#} the colour red. Hence, every time when the New Year was about to come, the villagers would hang red lanterns and red spring scrolls on windows and doors. People also used fireworks {#blank#}10{#/blank#} (frighten) away the Nien. From then on, Nien never came to the village again.

    The representatives from six major international film festivals attended a {#blank#}1{#/blank#} (week) programme. Maria says that the Venice Film Festival is the oldest film festival in the world, {#blank#}2{#/blank#}is an annual festival that {#blank#}3{#/blank#} (begin) in 1932. Kathy tells the audience that the Sundance Film Festival deliberately boycotts all Hollywood films and that they don't foresee ever including {#blank#}4{#/blank#}. Isabel says Cannes is {#blank#}5{#/blank#} festival that can make films famous, at which many films {#blank#}6{#/blank#} (show) to the public for the first time. At Berlin International Film Festival, Hollywood films are {#blank#}7{#/blank#}the minority, films that are likely to be overlooked at other festivals have a real chance of {#blank#}8{#/blank#} (become) champions. Mike thinks the Toronto International Film Festival is the {#blank#}9{#/blank#}(two) largest festival in the world. Xu Li says the Shanghai International Film Festival has a good reputation worldwide and they have {#blank#}10{#/blank#} (entry) from many different countries.