单项选择题

Section A Directions:This section is to test your ability to understand short dialogues. There are 5 recorded dialogues in it. After each dialogue, there is a recorded question. Both the dialogues and questions will be spoken only once. When you hear a question, you should decide on the correct answer from the 4 choices marked A), B), C) and D) given in your test paper. Then you should mark tile corresponding letter on the Answer Sheet with a single line through the center.

When must the man check in？（）

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