题目内容：

根据上下文填写适当的单词补全对话
A：Hello,7-4-8-double 3-2-5.
B:Oh,hello.Could I （）to Lucy,please?
A:I'm afraid she's （）at the moment.She's （）to the school library.Can I take a message?
B:Yes.Could you tell her to()me a ring,please?
A:Sure!Who is （）please?
B:Zheng Xiaoyu.I'm her classmate.
A:And your telephone ()?
B:2-double 9-6-0-3.
A:2-double 9-6-0-3.Right.
B:Thanks a lot.Bye.
A:It's a ().Bye.