湖北自考英語二復習精要UNIT 2(5)

　　Ⅱ.Word Form

　　1.Supernovae____(report) by astronomers in the seventeenth and eighteenth centuries.

　　2.Imagine the earth reduced to the size of a marble, but still____(have) the same mass, and you have some idea of the force of a black hole.

　　3.If one____(make) a journey over the Continents one would find every kind of surface including mountain ranges, plains, and empty areas covered permanently by ice and snow.

　　4.And astronomers are planning a new observatory to study the individual exploding stars____(believe) to be black holes.

　　5.Matter from the one which we can see____(pull) towards the companion star.

　　6.There might be a massive black hole at the centre of our galaxy____(swallow) up stars at a very rapid rate.

　　7.The most____(convince) evidence of black holes comes from research into binary star systems.

　　8.They show us a world which operates in a ____(total) different way from our own.

　　9.The surface of some areas____(consist) largely of high mountains and deep valleys.

　　10.Our world is the home of a very great many different people-peoples with different____(colour) skins.

　?、?Vocabulary and Structure

　　1.Astronomers and scientists think that a black hole is a region of space (not a thing)____which matter has fallen and____which nothing can escape-not even light.

　　[A] into into

　　[B] into from

　　[C] from into

　　[D] from from

　　2.This process of shrinking may be so intense____a black hole results.

　　[A] whether

　　[B] what

　　[C] which

　　[D] that

　　3.Binary stars,____their name suggests, are twin stars whose position in space affects each other.

　　[A] as

　　[B] that

　　[C] what

　　[D] if

　　4.In some binary systems, astronomers have shown that there is an invisible companion star, a 'partner' to____which we can see in the sky.

　　[A] the one

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