GWD-TN-19 几题求解

zhc199069

20. GWD28-Q20:
In the 1820’s, anthracite coalfields opened in eastern Pennsylvania, and when canals and eventually railroads reached into the region, there were substantial supplies of coal that was exported to the nation’s growing mills, forges, factories, and railways.

A.    when canals and eventually railroads reached into the region, there were substantial supplies of coal that was
B.    once canals and eventually railroads reaching into the region, there were substantial supplies of coal having been
C.    with canals and eventually railroads reaching into the region, there had been substantial supplies of coal
D.    canals and eventually railroads reached into the region, with substantial supplies of coal being
E.    as canals and eventually railroads reached into the region, substantial supplies of coal were
除了用xdf的there be 和being来排除外，大家还有什么方法呀？

24. GWD28-Q24:
Until the passage of the Piracy and Counterfeiting Amendments Act in 1982, a first-time charge of copyright infringement was merely a misdemeanor charge, federal prosecutors being unlikely in pursuing criminal copyright infringers, while offenders were subject to relatively small penalties.

A.    charge, federal prosecutors being unlikely in pursuing criminal copyright infringers, while offenders were
B.    charge, with federal prosecutors who were unlikely to pursue criminal copyright infringers, offenders being
C.    charge, federal prosecutors unlikely to pursue criminal copyright infringers, while offenders were
D.    charge; therefore, federal prosecutors were unlikely in pursuing criminal copyright infringers and offenders being
E.    charge; therefore, federal prosecutors were unlikely to pursue criminal copyright infringers, and offenders were
这题要怎么解释呢？大家是怎么做的呀？


Q6 :TT-GWD 2-34.
NASA’s methodical approach to the exploration of Mars has not yet answered the questions of whether biological life forms ever emerged on Mars and whether, presuming such life forms having left fossil traces to begin with, those traces can still exist in some moist recesses of the cold and arid planet.

A.    and whether, presuming such life forms having left fossil traces to begin with, those traces can
B.    and whether, if it is presumed that such life forms left some fossil traces to begin with, can those traces
C.    and whether, presuming such life forms left fossil traces to begin with, those traces
D.    and, presuming such life forms did leave some fossil traces to begin with, if they can
E.    and, presuming such life forms to have left fossil traces to begin with, if they
24套答案选C,31套的却选A，到底哪个对呢？万一考场上碰到这题怎么办呀？我选的是C,大家的看法呢？