单项选择题

Doctors see a connection between increased amounts of leisure time spent ___________and the increased number of cases of skin cancer.

A．to sunbathe
B．to have sunbathed
C．having sunbathed
D．sunbathing
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The system was redesigned to embrace the network and eventually ___________ it in a profitable direction.
A．adapt
B．control
C．install
D．steer
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The 215-page manuscript, circulated to publishers last October, ___________ an outburst of interest.
A．flared
B．glittered
C．sparked
D．flashed
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