自考“英語（二）”完整講義（23）

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
    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