解析：选C　细节理解题。根据题干中的关键词Errin Anderson定位到表格第一栏，根据其中的" ... only to discover they were all trying to rearrange a vase of flowers they got me."可知，令埃林·安德森意想不到的是她收到了学生送的花儿。故选C项。

　　2．What would Jennifer Graham do when she feels blue?

　　A．Drink some coke.　　　 　B．Wear the earrings.

　　C．Rearrange flowers. D．Read the card.

　　解析：选D　细节理解题。根据题干中的关键词Jennifer Graham定位到表格第二栏，根据其中的" ... I still take it out and read it when I'm feeling down."可知，当珍妮弗·格雷厄姆心情不好时，她会拿出学生写给她的卡片读一读。

　　3．Who got a big surprise from a usually calm student?

　　A．Errin Anderson. B．Katie Ann.

　　C．Eli Sullivan. D．Jennifer Graham.

　　解析：选B　细节理解题。根据表格第三栏中的" ... I saw my quietest student standing there with his mom ... It was an adorable pair of earrings ..."及"It made my whole day better ..."可知，凯蒂·安从平时沉默寡言的学生那里得到了大大的惊喜。

　　B

　　(2018·河南省六校联考)In the age of the social network, there's definitely such a thing as sharing too much；when it comes to losing weight, sharing could be key, though.

　　A new Northwestern University study published in the Journal of the Royal Society Interface found that those who had an active hand in such online communities lost a higher percentage of their body weight compared to users who participated sparingly.

The researchers discovered that the users who recorded their weight and established close relations with other members were more likely to achieve their goals of ridding themselves of pounds.The most active users lost more than 8 percent of their body weight in a six­month period.The least active users, those with the fewest online friends and social interactions, lost around 5 percent of their body weight in the same period of time.The researchers theorize that participation plays a key role in weight loss because it offers an