语法填空（共10 小题；每小题1.5分,满分15分）Americans love pets. In America, there are more families with pe

语法填空（共10 小题；每小题1.5分,满分15分）
Americans love pets. In America, there are more families with pets 16 those with children. It is common 17 U.S. homes have some sort of pets, such as monkeys, snakes and even wolves. But Americans’ all-time favorites are cats and dogs, because dogs can offer protection from thieves and unwelcome visitors and cats can help get rid 18 the home unwanted pests. Beneath keeping pets, there lies a basic American belief: Pets have a right to be treated well. In Houston, Texas, dogs can have their dinner 19 (deliver) to their homes, just like pizza. Pets can even go with 20 owners on vacation. Besides, at least 75 animal welfare organizations exist in America 21 provide care and adoption services for 22 (home) and ill-treated animals. To pay for the high-tech health care, people can buy health insurance 23 their pets. Pets are as basic to American culture as hot dogs or apple pie. By now researchers 24 (discover) that interacting with animals lowers a person's blood pressure. Pets even encourage social relationships: They give their owners an appearance of friendliness, and they provide 25 good topic of conversation.than

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