阅读理解。 Mr. Wang: May I come in? Mr. Liu: Oh, it's you. Please come in. Mr. Wang: Thanks. How are you this afternoon and how's your brother? Mr. Liu: I'm fine, thanks. My brother isn't at home now. He goes to see his friends on Sunday afternoon. He's fine, too. It's time to practice (练习) English, isn't it ? Mr. Wang: Yes. What are we going to talk about this time (这次)? Mr. Liu: What about this picture? Look, here it is! Mr. Wang: What a nice picture! I like it! Mr. Liu: So do I. It's a picture of Mr. Smith's family. Mr. Wang: Let me have a look. Ah, there're four members (成员) in the family. One, two, three, four. Mr. Liu: No, five. There're five. Mr. Wang: But I see only four. Look, Mr. Smith on the right (右边); Mrs. Smith on the left (左边) and two children in front of them. Mr. Liu: Look, here is another (另一个) one, a dog. Its name is Tom. Mr. Wang: Oh, I see. They must be very happy. Mr. Liu: Yes. They are very happy. 根据以上对话内容，在以下短文的空白处填入适当的词，使短文内容与对话相符，每空一词。 1____________ is 2____________ afternoon. Mr. Wang is at Mr. Liu's 3____________. They practice English at this 4____________ 5____________ the day. Mr. Wang 6____________ a picture. 7____________ is a picture 8____________ Mr. 9____________ Family. 10____________ 11____________ five members. 12____________ of them is 13____________, a 14____________. Mr. Smith 15____________ a happy family. 16____________ a happy family he 17____________!