【正确答案】 C

【答案解析】[听力原文] We have all witnessed the power of social media. It helped elect Barack Obama president in two thousand eight. It also helped to support popular revolutions in two thousand ten and eleven that forced several long-time rulers from office. Now, research suggests that social networks could have an even greater effect on elections, helping to increase the number of people who vote. [解析] 新闻结尾处提到social networks could have an even greater effect on elections．helping to increase the number of people who vote。故选项C正确。

【正确答案】 A

【答案解析】[听力原文] Manchester City midfielder Yaya Toure has been named the African Player of the Year for a second time. Toure beat fellow Ivory Coast star and former Chelsea striker Didier Drogba into second place. He won the 2012 poll in a vote of head coaches or technical directors of countries affiliated to the Confederation of African Football. [解析] 新闻第一句提到Manchester City midfielder Yaya Toure has been named the African Player of the Year for a second time。由此可知，选项A正确。

【正确答案】 C

【答案解析】[听力原文] Reshma Saujani launched an organisation called "Girls Who Code". Her goal is to get more girls interested in science and technology. And she says the underrepresentation of women in the fields of science, technology, engineering and mathematics, also known as STEM, is caused by a bigger societal issue. "Girls and boys perform about the same in maths and science. So there's not an aptitude issue. " [解析] 新闻前两句话提到Reshma Saujani launched an organisation called“Girls Who Code”．Her goal is to get more girls interested in science and technology。

【正确答案】 B

【答案解析】[听力原文] Tablet computers are one of the best-selling products this year. Brian Tong is Senior Editor of CNET. com. He says the Apple iPad Mini is one of the most popular tablets. One of Apple's biggest competitors is the Google Nexus 7. The hardware inside is more powerful than what's in the iPad Mini, but also it offers you a lot of things like maps that work better than Apple's maps. [解析] 新闻提至0ne of Apple's biggest competitors is the Google Nexus 7. The hardware inside is more powerful than what's in the iPad Mini。由此可见B项正确。

【正确答案】 B

【答案解析】[听力原文] The United States Environmental Protection Agency says only seven percent of plastic waste in the United States is recycled each year. A new company in northern New York says it can increase that percentage. It also says it can help the United States reduce the amount of oil it imports. [解析] 新闻中间提到A new company in northern New York says it can increase that percentage。that percentage指的是塑料废物的回收比。