Directions: You will hear 10 short dialogues. For each dialogue, there is one question and four possible answers. Choose the correct answer—A, B, C or D, and mark it in your test booklet. You will have 15 seconds to answer the question and you will hear each dialogue only once. What is the woman’s reply

A. She knows Professor Arnold has come.
B. She thinks Professor Arnold has checked in.
C. She is sure that Professor Arnold has arrived.
D. She doesn’t know whether Professor Arnold has arrived.