B)请先阅读下面短文，掌握其大意，然后根据短文内容从下面方框内的七个选项中选择五个还原到文中，使短文意思通顺、结构完整，并在答题卡上将其序号涂黑。一空一句。 
Do you know what your friends watched on TV last night? Do your friends know what you had for breakfast today? Do you think you are using social media (社交媒体) too much?
____49____ It is reported that around 2,800 million people often use social media. That’s almost 40 percent of the world’s population. But how much time do we really spend on social media? And what exactly do we spend that time doing?
Research shows that, worldwide, the average (普通的) person spends two hours and 19 minutes on social media each day. ____50____ An average person there spends four hours and 17 minutes a day on social media. Research also shows that women use social media more than men. In the United States, for example, women spend around two hours more a week than men on social media.
____51____ In general, it seems we spend more time looking at other people’s pages than adding to our own. According to one survey, the most common social media activities are visiting friends’ pages, reading their news, and commenting (评论) on their posts.
____52____ It has over 2,000 million users. In second place, however, is the Chinese site Qzone. In 2017, Qzone was China's most popular social media site, with around 600 million users worldwide. That's more than Twitter and Instagram.
Social media continues to grow. ____53____ And as Internet access (通道) becomes available to even more people around the world, this growth won't stop anytime soon.
A. What do most people do on social media?
B. Why do people communicate on social media?
C. People in Philippines are the most active users.
D. The most popular social media site is Facebook.
E. On Facebook, people post their news and photos.
F. Right now, there are 5 new Facebook users every second.
G. Social media is now a part of many people’ s everyday lives.
本文讲述了世界上越来越多的人使用社交媒体，文中介绍了人们使用社交媒体的平均时间，人们在社交媒体主要干什么，以及前两位的社交媒体网站，并最后指出社交媒体会继续不断增长。
49.G【解析】根据这段后面句子“It is reported that around 2,800 million people often use social media. That’s almost 40 percent of the world’s population. 据报道，大约有28亿人经常使用社交媒体。这几乎占世界人口的40%。”，可知这段首句应表达社交媒体现在已经成为许多人日常生活的一部分，选项G符合此意，故选G。
50.C【解析】根据后一句“An average person there spends four hours and 17 minutes a day on social media. 那里的人平均每天花4小时17分钟在社交媒体上。”，可知此句应特别指出某个地方的人经常使用社交媒体，所以选项C符合此意，故选C。
51.A【解析】根据后一句“In general, it seems we spend more time looking at other people’s pages than adding to our own. 一般来说，我们花更多的时间去看别人的网页，而不是增加自己的网页。”，可知此句应问“大多数人在社交媒体上做什么?”,选项A符合此意，故选A。
52.D【解析】根据这段后面句子“It has over 2,000 million users. In second place, however, is the Chinese site Qzone. 它拥有超过20亿的用户。排在第二位的是中国网站Qzone。”，可知此句应指出第一位的社交媒体网站，选项D符合此意，故选D。
53.F【解析】根据前一句“Social media continues to grow.社交媒体继续增长。”，以及后一句“And as Internet access (通道) becomes available to even more people around the world, this growth won't stop anytime soon. 随着世界各地越来越多的人可以使用互联网，这种增长不会很快停止。”，可知此句应表达使用用户的增长情况，选项F符合此意，故选F。