第一节 听下面5段对话。每段对话后有一个小题，从题中所给的[A]、[B]、[C]三个选项中选出最佳选项，并标在试卷的相应位置。听完每段对话后，你都有10秒的时间来回答有关小题和阅读下一小题。每段对话仅读一遍。 What do you learn from the conversation

A．away
B．over
C．round
D．aside

[A] Because mechanical engineering was too boring.
B. Because he wanted to be a flier.
C. Because he was more interested in farming.