There are several other__12__to predict earthquakes. Scientists can measure the tiny__13__in the tilt(倾斜)of the land that happen before an earthquake occurs. Increases in the amount of radon(氡), a substance found in deep__14__, as well as a high level of water in the wells, can also__15__that an earthquake is likely to occur. In addition, scientists have found that some animals, like dogs, behave__16__before an earthquake: they become__17__and howl.
Seismologists have__18__predicted several earthquakes, such as the earthquake which occurred in Zhangjiakou, China in 1998. __19__, not all earthquakes are predictable, and a system for predicting is not yet__20__.
1.A.possible
B.likely
C.probable
D.hopeful
答案:B sb./sth. is likely to do sth.意为“某人/某物有可能做某事”。probable, possible常用it作主语。
2.A.over
B.up
C.on
D.against
答案:D push against sth.意为“对某物施加压力,挤压某物”。
3.A.study
B.learn
C.search
D.watch
答案:A 本句意“使用不同的仪器,他们密切地研究这些地区”。
4.A.take
B.observe
C.measure
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