Australian children are visiting social media websites at an increasingly younger age, a new survey suggests, with one in five "tweens" (children between the ages of about 10 and 14) admitting they have chatted to someone online they do not know. The report 'Tweens, Teens and Technology" by online security company McAfee found that children in the tweens age【C1】______of 8 to 12 were【C2】______technology faster than expected, with 67 percent using a social media website..【C3】______the age eligibility for Facebook being 13, one in four (26 percent)【C4】______using the site— although 95 percent said they had their parents'【C5】______to do so. The most【C6】______site for tweens was Skype (used by 28 percent),【C7】______children were also using Instagram, according to the survey of 500 youngsters geographically【C8】______of Australia's online population.【C9】______the survey found that one in five tweens (19 percent) said they chatted to someone online that they did not know,【C10】______seven percent said they had shared personal information. Australia's Communications Minister Stephen Conroy said it was【C11】______that children talk to strangers online. "It shows we must remain【C12】______to online threats," he said. The findings suggest the age at which children first use social media is【C13】______, given a 2012 McAfee survey of teens aged 13-17 found the average age they opened their first social network【C14】______was 13. On average, tweens were using three or four devices that can be Internet【C15】______, with 66 percent of them【C16】______mobile phones and/or tablets. Fifty-four percent said they used a tablet for more than an hour a day. Most tweens use their devices to【C17】______the Internet, and on average spend about 1.5 hours a day browsing the web, the survey said. "Both parents and schools are encouraged to keep a close【C18】______on their child's online behavior to ensure they have safe online【C19】______," said Andrew Littleproud, president of McAfee Asia-Pacific. "By working closely with child psychologists, we have seen that online behaviors firmly set in the tween age group so active education is【C20】______within eight to 12 age bracket."
单选题
【C1】
【正确答案】
C
【答案解析】解析：本句提到的8 to 12(8至12岁)是一个年龄段，C项category有“种类，范畴”之意，与age搭配后表示“年龄段”，语义符合。
【答案解析】解析：本句提到的one in four(26 percent)的小孩因年龄太小本来不能上Facebook，但是空格后的using the site说明很多孩子已经违规使用该网站。admit to doing sth．表示“承认做了某事”，这些孩子承认正在使用Facebook，故选C项admitted to。
【答案解析】解析：文章一开始便表明少年儿童在接触社交网的年龄越来越小(at an increasingly younger age)，结合空格后提到2012年迈克菲发布调查结果：13～17岁青少年开通．网络……的平均年龄是13岁．推测该句想表达的是青少年接触网络的年龄更小了。A项falling“下降，降低”，符合语义逻辑。