Hunt's students, most of them seniors, work in threes or fours. They're presented with a series of stories that are rapidly and broadly spread via the Internet. Some are false information. Some are ads. And some are pure fact.

　　"We don't know which is which at this point，" laughs student Kahder Smith. "We actually have to sit down, take our time, and actually read them. And probably Google some stuff to see if it's real or not."

　　A post claims that more than a dozen people died after receiving the flu vaccine (疫苗) in Italy and that the CDC (Centers for Disease Control) is now telling people not to get a flu shot.

　　"I mean, I've heard many unconfirmed reports that the flu shot's bad for you，" student Autumn Cooper says. But instinct (直觉) tells her the story's wrong. "It just doesn't look like a reliable source. It looks like this is off Facebook and someone shared it." Cooper labels the story "fiction". And she's right.

　　Instead of teaching students the fundamentals of fact­checking, many schools simply ignore the problem, blocking social media sites on school computers.

　　"It's like teaching students to drive in the parking lot and then sending them out on the highway and saying 'Good luck！'" says Audrey Church, president of the American Association of School Librarians.

　　语篇解读：本文是议论文。美国的一些学校开设了教学生如何鉴别网络消息真假的课程，很多专家学者表示赞同。

　　24．What does the underlined word "they" in Paragraph 2 refer to?

　　A．Stanford researchers.　　　　　 B．Media people.

　　C．Students. D．Teachers.

　　解析：选C　代词指代题。根据第一段中的"America's students are shockingly bad at telling fact from fiction in this digital age"可知，在电子时代，美国的学生缺乏辨别真假消息的能力，由此可推测，这里是问"这些学生"怎样才能做好准备选择相信、传递、发布哪些消息呢？另外，根据第二段末的"when teachers give no practice to them"也可推测，这里的they指的是学生。

　　25．How does Hunt run the digital course?

　　A．By inviting experts to give students lectures.

　　B．By asking students to go on the Internet together.

　　C．By taking students to a news organization regularly.

D．By letting students identify factual information in groups.