To many students，joining social media"circles"（朋友圈） is now more important than making new friends in real life．And it's easy．If you have a mobile phone，you can download many things such as Sina Weibo，QQ and WeChat．

To many students，joining social media"circles"（朋友圈） is now more important than making new friends in real life．And it's easy．If you have a mobile phone，you can download many things such as Sina Weibo，QQ and WeChat．

答案：42．D 细节理解题．根据第二段句子"I love to check my friends'updates （更新）．I also enjoy news and humor shared on social media我喜欢查看朋友们的更新．"我也喜欢在社交媒体上分享新闻和幽默．"I love playing the plane-shooting game on WeChat，我喜欢在微信上玩平面射击游戏．可知没说在家里看电视．故选D．43．A细节理解题．根据第三段句子students were busy with updating WeChat blogs about the accident．学生们忙着更新微信上关于事故的博客．可知因为他的同学正忙着分享他们的更新．故选A．44．D细节推理题．根据上下文Many students are happy to tell their interests and personal information to their social media‘friends'．And this could bring them danger，"said Miss Wang，很多学生很乐意把自己的兴趣和个人信息告诉他们的社交媒体朋友．这可能会给他们带来危险．可知这里的this指的是和他们的社交媒体朋友分享个人信息．故选D．45．C细节理解题．根据整篇文章内容及其第一段句子To many students，joining social media"circles"（朋友圈） is now more important than making new friends in real life．对于许多学生，加入媒体社交圈比现实生活中的交友更重要．和第四段句子Many students are happy to tell their interests and personal information to their social media‘friends'．And this could bring them danger，"said Miss Wang，很多学生很乐意把自己的兴趣和个人信息告诉他们的社交媒体朋友．这可能会给他们带来危险．可知微信将学生从现实生活中分离出来，也可能给他们带来危险．故选C．