C．cried loudly D．closed the door

B　解析：词义猜测题。根据第二段中的"He quickly opened it and went down the passage to the Queen's Room as fast as he could."的描述可知此处是Tom跑远了不能被看见了，故选B。

4．Jason and Peter laughed because________．

A．they had got Tom into trouble

B．they liked telling jokes

C．they had played a joke on Tom

D．Tom didn't listen to them

C　解析：推理判断题。根据第三段中的"Jason and Peter took the pieces of white cloth(布) off their faces and walked slowly down the passage.They couldn't stop laughing."可知是因为他们给 Tom 开了一个玩笑，故选C。

　　(2018·四川宜宾高二上学期期末)After having more than a few acquaintances(相识的人) online，it might come a blow to keen social networkers like Barack Obama，or even Facebook founder Mark Zuckerberg himself.

　　According to a research，the average person has in fact twice as many online friends as physical ones.Users of social­networking sites have on average 121 online friends as compared with physical ones.The study also claims that people tend to be more open，confident and honest with their virtual friends than their "real" ones.

　　"For most people，the Internet is a way of keeping in touch with loved ones and friends，but for people who are isolated(隔离的) due to illness，it plays a more vital role，and can often act as a lifeline，" says Helen Oxley，a psychologist at Wythenshawe hospital.

　　"People with illnesses often rely on the Internet to facilitate(促进) friendships，since they blog and use networking sites as a way of dealing with their illness.It can foster(培养) a sense of social connection for those who frequently feel isolated，which is important to psychological well­being."

　　In wider society，the ways in which friendships are formed are changing，with people recognizing that they can develop deep and meaningful connections with others that they've never met，and may never meet.About one in 10 people has either met their best friends online，or believes they can make lifelong friends on the Web.

　　The findings highlight how social introductions are also changing.Only five percent would ask for someone's phone number，while 23 percent are now likely to ask for an email address or a full name with the intention of adding the person to their social network.

At the same time，however，a questionnaire completed by 4，427 suggests that 20 percent of parents believe their children's education is affected by surfing the Net.They think their children