单项选择题

In parts of the Arctic, the land grades into the landfast ice so ______ that you can walk off the coast and not know you are over the hidden se

A． permanentlyB. imperceptiblyC. irregularlyD. precariously
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单项选择题
After thirty years of television, people have become speed watchers . Consequently, if the camera lingers, the interest of the audience ______.
A．broadens
B．begins
C．varies
D．flags
单项选择题
With its maverick approach to the subject, Shere Hite's book has been more widely debated than most. The media throughout the country have brought the author's ______ opinions to the public's attention.
A．controversial
B．authoritative
C．popular
D．conclusive
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