题目内容：

A five-year-old dog named Kelsey has been praised as a hero for helping to save the life ofher owner who slipped in the snow and broke his neck.

The man, Bob, was alone when he left his Michigan farmhouse on New Year’s Eve tocollect firewood. Expecting a journey of only several meters, Bob was wearing just longjohns(衬裤), a shirt and slippers when he went outside, although the temperature was around-4°C.

After the accident, he was unable to move in the snow. Fortunately, Kelsey came to hisassistance.

“I was shouting for help, but my nearest neighbor is about 400 meters away, and it was10:30 pm,” Bob explained. “But my Kelsey came. By the next morning, my voice was goneand I couldn’t yell for help, but Kelsey didn’t stop barking.”

Kelsey’s companion kept him warm by lying on top of him. She licked his face and handsto keep him awake. “Kelsey kept barking but never left my side,” Bob recalled. “She keptme warm. I knew I couldn’t give up and that it was my choice to stay alive.”

Bob spent 20 hours in the freezing cold. When he finally lost consciousness, his dog keptbarking. Finally, hearing the barking, Bob’s neighbor discovered him at 6:30 pm on NewYear’s Day and called the emergency services at once. When Bob arrived in hospital, his bodytemperature was below 21°C. However, doctors were surprised to find that he didn’t have anyfrostbite(冻疮). They believed it was because of Kelsey’s determination to keep him warm. Dr.Chaim Colen, the doctor who treated Bob, said, “Animals can help and his dog really savedhim... He was very fortunate.

Bob said he was “enormously” grateful to both Dr. Colen and his Kelsey. “They savedmy life. They are truly heroes!”

1.What happened to Bob on New Year’s Eve?

A. He left his dog alone in his farmhouse.

B. He was praised for saving a dog owner.

C. He broke his neck and couldn’t move.

D. He heard his neighbor’s shouting for help.

2.Why did Kelsey keep barking?

A. To keep warm.

B. To stay alive.

C. To keep Bob awake.

D. To seek help from others.

3.How does Dr. Colen feel about Kelsey?

A. Helpful.    B. Fortunate.

C. Grateful.    D. Friendly.

4.What can be a suitable title for the text?

A. A Neck-breaking Accident    B. The Magic Night

C. Warmth on a Winter’s Night    D. Determination to Keep Alive