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　　Passage 6

　　Astronomers （宇航员） can tell just how hot the surface of the moon gets. The side of the moon toward the sun gets two degrees hotter than boiling water. The night side reaches 243 degrees below zero.

　　In a lunar eclipse （月食） the earth's shadow falls on the moon. Then the moon's temperature may drop 300 degrees in a very short time.

　　A temperature change like this cannot happen on the earth. Why does it happen on the moon？ Astronomers know that the surface of the moon is dust. On the earth， rocks store heat from the sun. When the sun goes down， the rocks stay warm. But the dust of the moon cannot store heat. So when the moon gets dark， the heat escapes quickly. The moon gets very cold.

　　1. Astronomers have found that the moon's surface is ______.

　　A. always hotter than boiling water

　　B. either very hot or very cold

　　C. usually many degrees below zero

　　D. about the same as that of the earth

　　一般情况下，文章句话（主题句）是表明文章的中心。that指代temperature. 答案：B

　　2. During a lunar eclipse， the moon is ______.

　　A. turned away from the sun

　　B. in the shadow of the sun

　　C. in the shadow of the earth

　　D. in direct sunlight 答案：C

　　3. Temperatures on the moon change ______.

　　A. very quickly B. by only a few degrees

　　C. very slowly D. only when there is an eclipse 答案：A

　　4. Temperatures on the earth change ______.

　　A. less than those on the moon

　　B. more slowly than those on the moon

　　C. more quickly than those on the moon

　　D. Both A and B 答案：D

　　5. The surface of the moon is ______.

　　A. rock that stores heat

　　B. dust that stores heat

　　C. dust that cannot store heat

　　D. rock that does not store heat

　　store 存储 答案：C

　　本文重点掌握第4题和第5题。

　　第4题主要在没有关键词的情况下，进行常识判断并选择。

　　第5题运用关键词定位原文，并排除错误选项，再对余下的选项对照原文进行二次分析，终确定选项。