4．
阅读下面短文，掌握其大意，选择可以填在横线上的最佳选项。 Tom had a dog named Max. Max was 10 years old, which was quite 1 in dog years. Tom bought the dog to protect him and his family from 2. When Max saw something suspicious (可疑的), he barked loudly. There was one time when a bad man was trying to get into Tom's house. Thankfully, Max barked loudly and Tom's dad was able to 3 the bad man in time. Sometimes though, Max would bark when he saw another dog. Tom would go outside 4 something bad was happening, but it was really just another dog.
Tom went on a lot of hikes and walks with Max. Tom did not like to exercise, but he did not 5 if it was with Max. Tom would also take Max to the dog beach, where Max could play with other dogs. Max was considered part of the 6. He was even in the family holiday postcard picture. Tom knew, however, that Max was going to 7 soon. He tried not to think about it.
One day, Tom came back home from school and filled up Max's water bowl as usual. Except this time, Max did not run to the 8 as he usually did. Tom looked around the house for Max and found him lying on the floor. Tom was surprised. He 9 ran to Max and called his name over and over again. He was gone. Tom and his family buried (埋葬)him in their backyard. He 10 for a long time, and remembered all his good memories with Max.
