三、补全对话
根据下面的对话情景，在每个空白处填上一个适当的句子，使对话的意思连贯、完整。
A: Hi, Lily. Do you use social media?
B:21. ! It's fun to talk with friends online.
A: Do you know how to keep safe online?
B: Hmm...not really. 22. ?
A: First, don't share personal information, like your address and phone number.
B: OK. I like to send my photos to my online friends. 23. ?
A: No, it's not safe. With AI, someone could use your photo to deceive(欺骗) your parents or friends.
B: That sounds awful. By the way, an online friend invited me to meet her at the park. 24. ?
A: I don't think you should go. But if you really want to meet her in person, you can ask your parents to go with you.
B: You're right. 25. . I will be careful online.
A: You're welcome! Let's keep ourselves safe.

21. Yes,I do/Sure/Of course
22. Can you tell me (how to keep safe online)/How can I keep safe online/What should I do/...
23. Is it safe/Is it okay/...
24. Should I go to meet her/Is it a good idea to meet her/...
25. Thank you for your advice/Thanks a lot/...

【分析】
本题为围绕“网络安全”话题的补全对话，需结合上下文的问答逻辑、语境含义填写合适的句子。21题需对A的一般疑问句作肯定回答；22题因B不懂网络安全方法，向A询问；23题B提及发照片后A说明不安全，B询问相关安全性；24题B因网友邀请见面，询问是否该去；25题A给出安全建议后，B向A表达感谢。
【解析】
21题：根据A的问句“Do you use social media?”及B后续表述“It's fun to talk with friends online”，可知此处需作肯定回答，故填“Yes,I do/Sure/Of course”；
22题：B表示“not really”（不太懂网络安全），向A询问保持安全的方法，故填“Can you tell me (how to keep safe online)/How can I keep safe online/What should I do/...”；
23题：B提到喜欢发照片，A回应“it's not safe”，因此B询问发照片是否安全，故填“Is it safe/Is it okay/...”；
24题：B说网友邀请见面，A建议不该去，故B询问是否该去见网友，填“Should I go to meet her/Is it a good idea to meet her/...”；
25题：A给出安全建议后，B向A表达感谢，对应A的“You're welcome!”，故填“Thank you for your advice/Thanks a lot/...”。
【答案】
21. Yes,I do/Sure/Of course；22. Can you tell me (how to keep safe online)/How can I keep safe online/What should I do/...；23. Is it safe/Is it okay/...；24. Should I go to meet her/Is it a good idea to meet her/...；25. Thank you for your advice/Thanks a lot/...
【知识点】
补全对话、日常交际用语
【点评】
本题为日常交际类补全对话，围绕网络安全话题，考查学生在具体语境中运用英语日常表达的能力，贴近生活实际，难度适中。
【难度系数】
0.5