Police arrested two 17-year-old boys on Wednesday. The two boys tied a dog to a train track and gave the animal two shots on March 4. Police took the dog to an animal hospital. They named her Cabela.

Police say video showed four people walking to the tracks with a dog. Two adults left, but the two young stayed. One of the adults helped the police get the two young boys.

The dog's owner said the dog ran away about four months ago. Police say some people bought the dog and made her fight with other dogs, when the dog wouldn't fight, they decided to kill her.

Police say one of the boys threw the dog into the woods and shot at her. The dog ran back home, but the boys caught her and brought her back to the tracks and tied her to the track.

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1.Why did police arrest the two boys?

A Because they shot an old woman.

B Because they robbed a shop.

C Because they drove too quickly in town.

D Because they shot a dog and tied it to track.

解析：选D。D 细节理解题。根据第1段第2句The two young men tied a dog to a train track and gave the animal two shots…可知，故选D。

2.What do police call the dog?

A Cabela.

B Bela.

C Cary.

D Bala.

解析：选A。A 细节理解题。根据第1段最后1句They named her Cabela.可知，故选A。

3.We call someone an________when he is over 18 in China as in paragraph 2.

A apple.

B orange.

C egg.

D adult.

解析：选D。D 语义理解题。根据题干中人称代词he可知是指人，只有D项符合，故选D。

4.Some people bought the dog in order to__________.

A keep her as a pet.

B keep the house safe.

C make money.

D help the old people.

解析：选C。C 判断推理题。根据第3段内容“买狗，斗狗，杀狗是为了盈利，故选C。

5.Who else helped kill the dog?

A An adult.

B Another adult.

C Another boy.

D The police.

解析：选C。C 判断推理题。警方逮捕两个男孩，故应是另一个男孩与一个男孩合谋杀狗，故选C。