B. offer professionals good chances

C. guide users to make right choices users to make right choices

D.benefit users in various ways

10. Faced with problems caused by social media, some companies ________.

A. forbid the use of social networks during work time

B. avoid posting embarrassing information

C. refuse to hire potential addicted employees

D. takelegal action against the attackers

11. The main purpose of this passage is to _________.

A. share experiences in using social media

B. remind people to wisely use social media

C. raise public awareness of social problems

D. provide some advice on social problems

D

Joanne was stuck in a traffic jam in central Birmingham at 5:30 and at 6:30 she was expected to be chairing a meeting of the tennis club. At last，the traffic was moving. She swung quickly racing to her house. As she opened the door，she nearly tripped over Sheba.

“Hey, Sheba,” she said, “I’ve got no time for yonow, but I’ll take yoout as soon as I getback from tennis club.”Then she noticed Sheba seemed to be coughing or choking. Obviously，she could hardly breathe.Immediately, Joanne realized she would have to take her to the vet (兽医).

When she got there，the vet was just about to close for the day. Seeing the state of Sheba, Dr. Sterne brought her quickly into his office.

“Listen，doctor，I’m really in a rush to get to a meeting. Can I leave her with you，and go and get changed? I’ll be back in ten minutes to pick her up，and then I'll take her on to the meeting with me. Is that OK?”

“Sure.” said the doctor.

Joanne made the quick trip back to her house in a couple of minutes’. As she was once moreentering the hallway，the phone by the door began to ring.

“This is Dr.Sterne,” said in an anxious voice.“I want yoto get out of that house immediately,” said the doctor’s voice. “I’m coming round right away, and the police will be there any time now. Wait outside!”

At that moment，a police car screeched to a stop outside the house.Two policemen got out and ran into the house. Joanne was by now completely confused and very frightened. Then the doctor arrived.

“Where’s Sheba? Is she OK?” shouted Joanne.

“She’s fine, Joanne. I took out the thing which was choking her, and she’s OK now. ”

Just then, the two policemen reappeared from the house, half-carrying a white-faced man, who could hardly walk. There was blood all over him.

“My God,” said Joanne, “how did he get in there? And how did yoknow he was there?”

“I think he must be a burglar.” said the doctor.“I knew he was there because when I finally removed what was stuck in Sheba’s throat: it turned out to be three human fingers.”

12. What was Joanne supposed to do at 6:30?

A. To attend a club meeting.

B. To see her doctor.

C. To walk her dog.

D. To play tennis with her friends.

13. Joanne wanted to get back to her home again ______.

A. to catch the badly hurt burglar

B. to phone the police station

C. to dress up for the meeting

D. to wait for her dog to be cured

14. From the passage，we can infer that ______.

A. the police found the burglar had broken in

B. Sheba fought against the burglar