在横线上填上一个单词或句子
A: Hi ! Mary.
B: Hi! Jim.
A:                           
B: I’m fine, thanks. And you?
A: I’m OK.                          ?
B: It’s a book.
A:                                 ?
B: It’s red.
A:                                 ?
B: Yes. B-O-O-K, book.
A:                                 .
B: You are welcome.