摘要： When did the conversation probably take place?A. After the trip. B. During the trip. C. Before the trip.第二节听下面几段对话或独白.每段对话或独白后有几个小题.从题中所给的A.B.C三个选项中选出最佳答案.并将其标号填入题前括号内.每段对话或独白读两遍.听下面一段对话.回答第6至第7两个小题.

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