The saying “Dogs are people’s best friends” is an old one. People and dogs _____6_____ together since ancient times. Many dogs serve _____7_____ as pets. But some dogs have real jobs to do. They work as police dogs and as guide dogs for the blind. Some breeds of dogs do these jobs _____8_____ others. Very often, people choose German shepherds for this work. What makes these dogs so good at it? German shepherds have many _____9_____ that make them good work dogs. For one thing, they are the right size. They are quite large and strong. They also look alert and are very smart. So it is easy to train them to do hard jobs. What’s more, German shepherds have the right traits. They are patient and can wait _____10_____ for a long time. The dogs’ calm and gentle natures show that they can be well trained. 【題組】7 (A)even (B)not just (C)so long (D)only
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