B. consider facial expressions universally reliable

　　C. observe the eyes and the mouth in different ways

　　D. have more difficulty in recognizing facial expressions

22. What were the people asked to do in the study?

　　A. To make a face at each other. B. To get their faces impressive.

　　C. To classify some face pictures. D. To observe the researchers' faces.

23. What does the underlined word "they" in Paragraph 6 refer to?

　　A. The participants in the study. B. The researchers of the study.

　　C. The errors made during the study. D. The data collected from the study. B

　　He may not have an "S" across his chest but this dog is most certainly a hero.

Harley, who was rescued from a puppy mill four years ago, was named the American Humane Association's 2015 American Hero Dog. Harley, who is missing an eye and has other medical issues from his time at the mill, is now a "spokes-dog" against puppy mills. He serves as the adorable furry face of the "Harley to the Rescue" campaign, which raises funds for the National Dog Mill Rescue, according to a press release.

The pup was rescued back in 2011 and adopted by Rudi and her husband, Dan. "It was just four years ago that he was pulled from the cage in the puppy mill and left to die," Harley's owner, Rudi, said during the awards show at the Beverly Hilton Hotel in Los Angeles this past weekend, according to Today. com. "We never would have ever thought he would live this long and make such a difference for so many puppies."

The dog was one of eight finalists up for the American Hero Dog and was chosen as the winner through public votes. The finalists all won $ 1,500 to be donated to one of American Humane Association's charity partners, with Harley receiving another $ 5 ,000 to go toward his charity partner, New Leash On Life.

According to the release, Harley spent 10 years at the puppy mill, and endured rough treatment there, which led to his many medical issues. He lost his eye as a result of his cage being power-washed with him inside.

　 The dog isn't just the face of his campaign, he also goes on rescue missions and makes public appearances at events and schools to raise awareness for puppy mills.

This incredible work is all due to the dog's fighting spirit. That spirit is allowing him now to be the voice for dogs who cannot speak for themselves and give everybody hope that tomorrow's going to be a better day.

24. How did the "Harley to the Rescue" campaign function?

A. By saving dogs from a puppy mill.

B. By operating the American Humane Association.

C. By collecting money for the National Dog Mill Rescue.

D. By giving endangered dogs-enough medical treatment.

25. What was the author's attitude to the puppy mill according to the text?

A. Unsatisfied. B. Sympathetic. C. Doubtful. D. Tolerant.

26. Why was Harley blind in one eye?

A. She was born with it. B. Her owner treated her roughly.

C. It was caused by a medical issue. D. She was washed heavily in a cage.