单项选择题

The electronic computer is ______some of the tasks that were once accomplished by our own brains.

A．taking on
B．taking over
C．taking off
D．taking in
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单项选择题
Some medical conditions can often cure themselves______, without medical intervention.
A．deliberately
B．spontaneously
C．consciously
D．intentionally
单项选择题
Many biologists are critical of the film's ______premise that dinosaurs might one day return.
A．scientific
B．speculative
C．ambiguous
D．unwitting
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