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 the 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 the corresponding letter on the Answer Sheet with a single line through the center.
What time does this conversation take place？（） A．At 6:30 p.m.
B．At 5:50 p.m.
C．At 5:30 p.m.
D．At 6:50 p. m.