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  3. Can earthquake be predicted? Scientists are (1)_____ programs to predict where and when an earthquake will occur. They hope to (

Can earthquake be predicted? Scientists are (1)_____ programs to predict where and when an earthquake will occur. They hope to (

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问题     Can earthquake be predicted? Scientists are (1)_____ programs to predict where and when an earthquake will occur. They hope to (2)_____ an early warning system that can be used to (3)_____ earth-quakes so that lives can be saved. The scientists who are (4)_____ this work is called seismologists. The word seismologist is (5)_____ from the Greek word seismos, meaning earthquake.
    Earthquakes are the most dangerous and (6)_____ of all natural events. They occur in many parts of the world. Giant earthquakes have been (7)_____ in Iran, China, India, Alaska, and so on. Two of the biggest earthquakes that were ever recorded (8)_____ in China and Alaska, which measured about 8.5 on the Richter Scale. The Richter Scale was (9)_____ by Charles Richter in 1935, and compares the energy (10)_____ of earthquakes. An earthquake that measures a 2 on the scale can be felt but causes (11)_____ damage. One that measures 4.5 on the scale can cause slight damage, and an earth-quake that has a reading of over 7 can cause (12)_____ damage. It is important to note that a reading of 4 indicates a quake ten times as strong as one with a reading of 3. How do earthquakes occur? Earthquakes are caused by the shifting of rocks along cracks, or faults, in the earth’s crust. The (13)_____ is produced when rocks near each other are pulled (14)_____ different directions.
    Earthquake (15)_____ is in its infancy. Scientists have only a (16)_____ understanding of the physical (17)_____ that cause earthquakes. Much more research has to be done. New and more up-to-date (18)_____ have to be found for collecting earthquake data and analyzing it. (19)_____, seismologists have had some success in predicting earthquakes. Several small earthquakes were predicted. While this is a small start, it is (20)_____ a beginning.

选项 A、recorded
B、occurred
C、predicted
D、measured
答案A
解析 语义衔接题。上一句提到它们(地震)出现在全球许多地区。紧接着本句指出：大的地震在伊朗、中国、印度、阿拉斯加等地区都有记载。这里单凭句子本身选择正确的动词有一定难度，但下一句中出现了动词recorded，而且还提到本句中提及的中国和阿拉斯加，显然下一句是对本句的进一步解释说明。根据词汇复现原则可知，此处应该选择recorded。occur意为"出现"，本题所在段落中第二句出现了occur这个动词，但其为不及物动词，不能用于被动语态，故此处排除；predict意为"预测"，此处谈论的不是有关地震的预测问题，故排除；measure意为"测量，计量"，虽然本题下一句中出现了measure这个词，但本句只是笼统地提及人们对有些地震做了记载，而下一句才具体提及某些地震的强度达到了里氏8.5级，因此measure不是本题正确选项。
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