Directions: In this part; there is a passage with ten blanks.For each blank there are four choices marked A.B.C and D.Choose the best answer for each blank and mark your answer on the Answer Sheet.

Millions of years ago, a volcano (火 i) built a mountain on the floor of the Atlantic.in eruption after eruption.it  46  up a great pile of volcanic rock, until it had wst accumulated a mass of hundred miles across at its base.reaching  47  toward the surface of the sea,emerging as an island of about two hundred square miles.

Thousands of years passed,and thousands of thousands,   48   the waves of the Atlantic reduced it to a small fragment above water.This fragment we know   49   Bermuda.

With variations, the life story of Bemuda has been repeated by almost every one of the   50   that interrupt the watery expanses of the ocean far from land,These   51   islands in the wst sea are fundamentally different from the continents.The major land masses and the ocean basins   52   are much as they have been throughout the greater part of geologic time.But islands are created today, destroyed tomorrow.They are the   53   of the violent, explosive,earth-shaking eruptions of submarine volcanoes, working perhaps for millions of years to achieve their end.Islands have always   54   much attention, Our imaginations can follow its shapes down through darkening waters to   55   it rests on the sea floor.We wonder why and how it rose here in the midst of the ocean.