A
(2020·湖北部分重点中学联考)A group of volunteers joined forces to form a human chain to flee four dolphins which had been stranded (搁浅) in a canal for four days.The four dolphins were seen in the water near the Fossil Park neighborhood in St. Petersburg, Florida, US, on Sunday. Experts from the Florida Fish and Wildiife Conservation Commission(FWC) had monitored the dolphins' activities in the past few days and hoped that they would swim out with the tide.
But when the dolphins struggled to leave the canal, the brave volunteers joined members of the National Oceanic and Atmospheric Administration and the Clearwater Marine Aquarium to form a rescue team to free them. Dozens of people gathered to take videos and pictures of the kind act. A team of 14 volunteers held hands to act as a block to guide the dolphins out of the narrow channel. They shouted and patted the water with their hands to direct the dolphins to vast expanses of Riviera Bay.Dolphins find their way in the water through echolocation(回声定位)．That means that they can recognize the echoes of sound waves that bounce off objects to find their way around.
Andy Garrett, a biologist of the FWC said，“We were able to keep that chain together. The dolphins were interested. They actually came over right away.” He added that when the team reached a bridge, the dolphins appeared a bit nervous and started doing some spins. “They made one real hard pass at our team and then went under the bridge and took off，” Garrett said. The operation lasted about 45 minutes and the rescue team did not use nets or any items that could stress the dolphins.
【语篇解读】 本文主要讲的是志愿者帮助解救被困在运河里的四只海豚的故事。
1．What can we know about the dolphins from Paragraph 1?
A．They formed a chain to protect themselves.
B．They lived in the water near the Fossil Park.
C．They were observed in secret by volunteers.
D．They were forced to stay in a canal for four days.
D [细节理解题。根据文章第一段中的“four dolphins which had been stranded(搁浅) in a canal for four days”可知，D项正确。]
2．Why did volunteers shout and pat the water?
A．To make sounds to attract some people.
B．To guide the dolphins out to Riviera Bay.
C．To celebrate the success of saving dolphins.
D．To test the different reactions of the dolphins.
B [细节理解题。根据文章第二段中的“They shouted and patted...to direct the dolphins to vast expanses of Riviera Bay”可知，志愿者们喊叫、拍打水面是为了引导海豚前往里维埃海湾，故B项正确。]
3．What words could best describe the volunteers?
A．Brave and caring.
B．Cautious and humorous.
C．Smart and ambitious.
D．Optimistic and energetic.
A [细节理解题。根据第二段第一句话中的“the brave volunteers”，并结合文章讲述的志愿者帮助解救被困在运河里的海豚的故事可知，志愿者们是勇敢且乐于助人的，故A项正确。]
4．What's the main idea of the text?
A．Dolphins swam to the canal to hunt for food.
B．Rescuers formed a human chain to save dolphins
C．Volunteers helped four dolphins find their way home.
D．Experts studied the ways of dolphins' finding directions.
B [主旨大意题。本文讲述志愿者帮助解救被困在运河里的四只海豚的故事，故B项正确。]
