【正确答案】 A

【答案解析】原文：W：Youth Travel Agency! What can I do for you, sir?M：I’ve read your advertisement about the tour to China. I am calling to inquire about it.Q：What does the man want to know?题干问说话人可能会做什么。通过对话内容可知，男士把手机落在了办公室,女士提议回去拿,所以他们会返回办公室。故选A。