单项选择题

______ the Hubble Space Telescope, astronomers detected the two small, faint moons orbiting Pluto in the Kupier Belt.

A. To use
B. Using
C. Having used
D. Use
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I don't recollect ______ her cry in public before.
A. to see
B. having seen
C. to watch
D. watch
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No longer are contributions to computer technology confined to any one country; ______ is this more true than in Europe.
A. hardly
B. little
C. seldom
D. nowhere
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