单项选择题

The finds of Geoffrey Marcy are frightening in that______.

A．it's the first time that astronomers have discovered such space entity
B．it substantially implies some kind of subversion to our present realization
C．it is an entire negation of the present astronomic research
D．they discovered the first extra-solar planet in astronomic study
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单项选择题
The searchers used NOT to believe______.
A．other stars may have the planets resembling those going around the sun
B．planet forms owing to the gas and dust in star formation
C．the formation of star is subsequent to that of planet
D．star is formed by the collapsing interstellar cloud
单项选择题
What do the remarks of Tremaine mean at the end of the passage
A．The overturn of the present study fruit may betoken new breakthroughs.
B．If we want to achieve something original, we must throw away the old.
C．The fruits available in each field couldn't hold water all the way.
D．It is always exciting experience to discard the old and obtain the new.
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