根据对话情景，在画线处填上适当的单词，使对话完整通顺。
A: Hello!
B: Hello! 1 is Bob. May I speak to Peter please?
A: Speaking.
B: Hi, Peter. Can you help me?
A: Certainly. 2 the matter?
B: My model ship doesn’t This _3What’s . Can you mend (修理) it?
A: Yes. But I am busy today. What about Sunday morning?
B: Sorry, I can’t hear you. The line is 4 .
A: How about half 5 eight on Sunday morning?B: OK. Thanks a lot. See you then.
A: See you.
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解析：
【小题1】在电话里介绍自己要用“This is···”
【小题2】此句意为“发生了什么事”应用“What is”
【小题3】根据句意“我的轮船模型坏了”此处应用work
【小题4】根据句意“对不起，我听不见电线坏了”得知此处应填bad
【小题5】表示时间地方法：分钟+past+点钟（分钟不过30分）所以此处应用past