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.
　　Ⅲ.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
　　[B] that
　　[C] the ones
　　[D] those
　　5.On the other hand, scientists have suggested that very advanced technology could one day____the energy of black holes for mankind.
　　[A] make fun of
　　[B] make sure of
　　[C] make use of
　　[D] make sense of
　　6.Astronomers have evidence of a few other stars too, which might have black holes as____.
　　[A] companies
　　[B] comparisons
　　[C] compounds
　　[D] companions
　　7.The earth is one of nine planets which move in____round the sun.
　　[A] track
　　[B] orbit
　　[C] tour
　　[D] route