C．parents have realized the importance of social networks

　　D．social networks offer a platform for parents to communicate

　　答案：C　主旨大意题。由第二段第二句话“However, more and more parents are beginning to realize just how important social networks are in their lives.”可知。

　　2．Teenagers may refuse a parent's friend request because ______.

　　A．they hide something from their parents

　　B．they are unwilling to be watched by parents

　　C．their parents tend to fall behind in technology

　　D．their parents make negative comments on them

　　答案：B　细节理解题。由第四段第三句话“On the other hand if you do accept, then you could have a sense of being watched and no longer feel free to comment or communicate the way you did before.”可知，青少年不愿加父母为好友，是因为他们不愿有被父母盯着的感觉。

　　3．The passage is mainly about ________.

　　A．privacy onlineB．social networks

　　C．the generation gap D．parents' friend requests

　　答案：D　主旨大意题。由文章大意可知。

　　4．The passage is written mainly for ________.

　　A．parents B．teenagers

　　C．teachers D．researchers

　　答案：B　推理判断题。由第一段最后一句话“...would you add your parents as ”friends“ and allow them to view your online activities and conversations with friends？”可推知，本文是写给青少年的。

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