英语六级

单选题What does the phrase "this problem" in Paragraph 3 refer to?

A.Most studies were typical and not general.
B.Most studies made a detailed study of people.
C.It's difficult to separate the use of social network from other factors.
D.There are some other factors affecting well-being.

参考答案:A进入在线模考
细节题。根据题干关键词定位到第三段。第一句为0ne of the problems is that most studies were cross-sectional。taking a snapshot of people at one point of time,接下来以A 2013 study led by Ethan Kross为例说明这个实验也忽视了上文提到的problem,因此可知this problem是指第一句的内容。因此,正确答案是A。

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1 Ethan Kross´s 2013 study failed to find __

A.how people use social network
B.whether people will get sad when they use Facebook
C.what it is about Facebook that might have negative effect
D.when people get sad during the use of Facebook

2It can be inferred from the last two paragraphs that __

A.well-being can be affected if one actively uses Facebook
B.subjects' mood changed when they messaged others through Facebook
C.using Facebook is bad for well-being when people graze its content
D.it's good for people to post their idealized lives on Facebook

3Which of the following can best summarize the main idea of the text?

A.Social network has negative impact on well-being.
B.Facebook is bad for users' in-the-moment mood.
C.Whether people can actively use social network.
D.Whether Facebook will make you sad depends on how you use it.