阅读理解。
My friend has a large police dog, Jim. Police dogs are often clever. Every Sunday afternoon my friend
takes Jim for a long walk in the park. Jim likes these long walks in the park very much. One Saturday
afternoon a young man came to visit my friend. He stayed a long time. He talked and talked. Soon it was
time for my friend to take Jim for his walk. But the visitor still stayed. Jim became very worried about his
walk in the park. He walked around the room several times and then sat down in front of the visitor and
looked at him. But the visitor paid no attention. He went on talking. Finally Jim could not stand any
longer. He went out of the room and came back a few minutes later. He sat down again in front of the
visitor but this time he held the visitor's hat in his mouth.
判断下列各句是否符合短文内容。（在括号内画"√""×"）
( ) 1. Jim is my friend.
( ) 2. My friend takes his police dog to the park once a week.
( ) 3. Police dogs are clever.
( ) 4. The dog was seated in front of the visitor because he wanted to listen to him carefully.
( ) 5. The dog kept the visitor's hat in his mouth means you must put on your hat when you are talking.
( ) 6. The visitor could nearly understand the dog.
