A、15%. B、25%. C、27%. D、73%. D选项表明本题考查数字。短文中提到有多少美国公司认为办公室养宠物是有益的，其中提到，Astudy of major U．S companies showed that 73％found office

Pet owners are being encouraged to take their animals to work. Scientists say that can be good for productivity, workplace morale, and the well-being of animals.
    A study found that 25% of Australian women would like to keep an office pet. Sue Chaseling of Petcare Information Service said the practice of keeping office pets was good both for the people and the pets. "On the pets’ side, they are not left on their own and won’t feel lonely and unhappy," she said. A study of major U.S companies showed that 73% found office pets beneficial, while 27% experienced a drop in absenteeism.
    Xarni Riggs has two cats walking around her Global Hair Salon in Paddington. "My customers love them. They are their favorites," she said. "They are not troublesome. They know when to go and have a sleep in the sun. "
    Little black BJ has spent nearly all his two years "working" at Punch Gallery in Balmain. Owner Iain Powell said he had had cats at the gallery for 15 years. "BJ often lies in the shop window and people walking past tap on the glass," he said.
    Ms. Chaseling said cats were popular in service industries because they enabled a point of conversation. But she said owners had to make sure both their co-workers and the cats were comfortable.
Questions 29 to 31 are based on the passage you have just heard.
29. What is the percentage of American companies that are in favor of keeping office pets?
30. What do we know about "BJ" from the passage?
31. Which would be the best title for this passage?