Part ⅣShort Answer Questions (15 minutes)

　　Directions:In this part there is a short passage with five questions or in　complete statements. Read the passage carefully. Then answer the questions or complete the statements in the fewest possible words (not exceeding 10 words).��

　　Tides are created mainly by the pull of the moon on the earth. The moon’s pull causes water in the oceans to be a little deeper at a point closest to the moon and also at a point farthest from the moon, on the opposite side of the earth. These two tidal “waves” follow the apparent movement of the moon around the earth and strike nearly every coast line at intervals of about twelve hours and twenty-five minutes. After reaching a high point, the water level goes down gradually for a little more than six hours and then begins to rise toward a new high point. Hence, most coast lines have two tides a day, and the tides occur fifty minutes later each day. Differences in the coast line and in channels in the ocean bottom may change the times that the tidal wave reaches different points along the same coast line. The difference in water level between high and low tide varies from day to day according to the relative positions of the sun and the moon because the sun also exerts a pull on the earth, although it is only about half as　strong as the pull of the moon. When the sun and the moon are pulling along the　same line, the tides rise higher, and when they pull at right angles to one another, the tide is lower. The formation of the coast line and variations in the weather are additional factors which can affect the height of tides. Some sections of the coast are shaped in such a way as to cause much higher tides than are experienced in other areas. A strong wind blowing toward the shore may also cause　tides to be higher.��

　　71. The time that high tide occurs at a particular place is affected by all of the position of the moon, channels in the sea bottom variations in the coast line EXCEPT ______ ______ ______ ______ ______ ______ ______ ______ ______.��

　　72.What is the accurate statement about the pull of the sun on the earth?______ ______ ______ ______ ______ ______ ______ ______ ______ ______.��

　　73. If one high tide occurs at 1:00 am, the next high tide at the same point will occur at about______ ______ ______ ______ ______ ______ ______ ______ ______.��

　　74. The height of the tide is affected by the position of the sun, the direction of the wind, variations in the coast line EXCEPT______ ______ ____________ ______ ______ ______ ______ ______.��

　　75. If the pull of the sun equaled the pull of the moon tides would ____________ ______ ______ ______ ______ ______ ______ ______ ______.��

　　Part ⅤWriting (30 minutes)

　　Directions:For this part, you are allowed thirty minutes to write a composition on the topic “Water”. You should write at least 150 words and you should base your composition on the outline (given in Chinese) below:��

　　1.水的重要性。��

　　2.中國的水資源問題。��

　　3.為了生存和發(fā)展人們要……。

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