【答案】　B

　　2．In Paragraph 5，the author is trying to tell the readers ．

　　A．how important making friends is

　　B．that friendship is not easy to keep

　　C．how much has been done to keep friendship

　　D．that friendship at school is important

　　【解析】　细节理解题。根据第五段Sam Owen所讲的话的第二句"It is a key time in our lives when friendship is growing through sharing notes，giving gifts，seeing each other regularly and laughing a lot"可知，学校时光是人生中建立友谊的重要阶段，这时候的友谊成长于分享笔记、赠送礼物、互相探望、一起欢笑中，故D项正确。

　　【答案】　D

　　3．The underlined phrase"drift away from"in Paragraph 6 means" "．

　　A．make sense of B．lose contact with

　　C．feel sorry for D．make up with

　　【解析】　词义猜测题。根据倒数第二段的第二句"Over half of us lose friendship...apart from close pals"及画线词所在句"Having children also causes 19% to...childhood friends"可以判断，画线词意为"失去联系"，故B项正确。A项意为"理解"，C项意为"对......感到抱歉"，D项意为"与......和好"，都与语境不符。

　　【答案】　B

　　4．This passage is most probably taken from ．

　　A．Facebook or Twitter B．an advertisement

　　C．a textbook D．a newspaper

【解析】　文章出处题。根据第一段中的"a new research has claimed"以及最后一段中的"these days"，再结合选项可以判断，本文最可能摘自报纸，故D项正确。