Many people like animals．Now a lot of people keep animals as pets(宠物)．Usually people like to keep dogs，cats，fish and other animals．Many young people keep animals because they think these animals are interesting．Some old people keep pets because they don’t live with their children．

    Martin lives in No．25 Garden Street．He is a doctor(医生)，but he helps dogs．People usually call him The Dog Doctor．When their dogs get sick(生病)，they call him on the telephone．He goes to the people’s houses and helps them．He gives the dogs the right medicine(药物)．Wherever(无论)he goes，he is always welcome．

现在，大学校园里不乏追“新”族，追求时尚．追寻潮流，甚至追求奢华消费。不少大学生上学时拿着父母给的钱花得非常潇洒，消费方式明显由“生存型”向“享乐型”发展。上述材料启示我们（    ）

After Steven sent some e-mails ,he______ surfing the Internet.