阅读下列短文, 从每题所给的A、B、C、D四个选项中选出最佳选项。Social media allow teenagers to create online identities, communicate with others and build social networks. These networks can provide teenagers with valuable support. Teenagers also use social media for entertainment and self-expression. And the platforms can expose teenagers to current events, allow them to communicate across geographic barriers and teach them about different kinds of subjects, including healthy behaviors. However, social media use can also negatively affect teenagers, distracting them, influencing their sleep, and exposing them to bullying (恐吓), rumor (谣言) spreading, untrue views of other people's lives and peer pressure.There are steps you can take to encourage responsible use of social media and limit some of its negative effects.Set reasonable limits. Talk to your teenager about how to avoid letting social media affect his or her activities, sleep, meals or homework. Encourage a bedtime routine that avoids electronic media use, and keep cellphones and iPads out of teenagers' bedrooms. Set an example by following these rules yourself.Monitor your teenager's accounts. Let your teenager know that you'll be regularly checking his or her social media accounts. You might aim to do so once a week or more. And make sure you follow through.Explain what's not OK. Discourage your teenager from gossiping, spreading rumors, bullying or damaging someone's reputation—online or otherwise. Talk to your teenager about what is appropriate and safe to share on social media.Encourage face-to-face contact with friends. This is particularly important for teenagers who are vulnerable to social anxiety disorder.Talk about social media. Talk about your own social media habits. Ask your teenager how he or she is using social media and how it makes him or her feel. Remind your teenager that social media is full of unrealistic images.If you think your teenager is experiencing signs or symptoms of anxiety or depression related to social media use, talk to your child's health care provider immediately.
(1)
How does the author mainly develop the first paragraph?
A . By providing reasons.
B . By making comparison.
C . By following the order of importance.
D . By raising questions.
(2)
What's a better way to avoid being affected by cellphones?
A . Powering them off.
B . Putting them in the schoolbag.
C . Keeping them out of bedroom.
D . Listening to them instead of watching.
(3)
What does the underlined word "vulnerable" in paragraph 6 probably mean?
A . Warm-hearted.
B . Easily hurt.
C . Deeply moved.
D . Hard-working.
(4)
Who is the text written for?
A . Teenagers.
B . Officials.
C . Teachers.
D . Parents.
答案: B
C
B
D