Direction: In the following passage some words have been deleted. Fill in the blanks with the help of the alternatives given. Select the most appropriate option for each blank.
An earthquake is the shaking of the ground caused by the sudden breaking and (1)_______ of large sections of the Earth's rocky outer shell. Scientists estimate that there (2)________ more than 8,000 minor earthquakes each day. Of these, only about 1,000 are strong (3)__________ to be felt. At least 40 moderate earthquake cause damage somewhere (4)_________ the world each year. A really powerful earthquake only occurs, on average, once every two years, (5)_________ when it does, the results can be devastating.