9.听下面一段对话,回答第15至第17三个小题. 15.What's the man ealling the woman for? A.To book a ball. B.To apply for a job. C.To buy some tickets. 16.Who is probably the man speaker? A.A professer. B.An assierant C.A writer. 17.What's the man's office number? A.56732428. B.56337748. C.56374488.