单项选择题

SECTION A CONVFRSATIONS
In this section you will hear several conversations. Listen to the conversations carefully and then answer the questions’ that follow.

Questions 1 to 4 are based on the following conversation. At the end of the conversation, you will be given 20 seconds to answer the questions.
Now listen to the conversation.
What is the purple of the conversation

A．To gather information for the student’s astronomy class.
B．To write a research paper about a recent discovery in space.
C．To report findings from an astronomers’ conference.
D．To get information for the astronomy club.

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问答题

[听力原文]The History Of CornIn the late 140Os, when Christopher Columbus returned to Spain from the western hemisphere, he brought with him a sample of maize. We call it more often today, corn. The corn that Columbus introduced to Europe was the distant descendant of a grass native to Mexico. The people of the Americas probably started to domesticate this grass as early as 5000 BC. After about a thousand years, they had developed a highly productive strand of corn. Domesticated corn and the people who cultivated it developed together. Without humans to care for it, domesticated corn could not survive. The kernels are crowded together beneath the strong protective husk and silk. And the young corn shoot is not strong enough to break through the husk on its own. If people did not strip away the husk and plant individual kernels, the corn would die out. [解析] 这篇听写材料的难度在于对一些固定搭配的理解，如：break through， strip away，对句型as...as，without... could not...，not... enough to... 的把握有助于对全文的理解。文中的shoot一词可能会对大多数的学生造成困扰，因为这里的shoot 并不是其常用意“射击”，而是“嫩芽”的意思。另外这篇短文中多处涉及专有名词，注意Christopher Columbus，Spain，Europe，Mexico，Americas，BC的大写。

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