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.
1.were reported 2.having 3.made 4.believed 5.is being pulled 6.swallowing 7.convincing 8.totally 9.consists 10.coloured
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
1.B 2.D 3.A 4.A 5.C
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
8.In August 1977， a satellite was____to gather data about the black holes in the Milky way.
[A] posted [B] delivered C] launched D] transmitted
9.The terms we would normally use to describe a scientific phenomenon are____here.
[A] inadequate [B] invisible [C] intense [D] individual
10.We know nothing about events which happen once objects pass this boundary， But____，matter must behave very differently inside the hole.
[A] in addition [B] in person [C] in detail [D] in theory
6.D 7.B 8.C 9.A 10.D Ⅳ C-E Translation
1.这个收缩的过程如此强烈，以至于黑洞产生了。 2.直到最近天文学家们才开始研究黑洞。
3.但是从理论上说，物质在黑洞里的行为一定非常不同。 4.黑洞最强有力的证据来自对双星系的研究。 5.有一天也许人类也会遭此命运。
1.This process of shrinking is so intense that a black hole results.
2.It is only recently/It is not until recently that astronomers have begun specific research into black holes.
3.But in theory， matter must behave very differently/in a very different manner inside the black hole.
4.The most convincing evidence of black holes comes from research into binary star systems.
5.Mankind may one day meet this fate.
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