单项选择题

The body also needs daily doses of sunlight to help ______ Vitamin D, crucial for maintaining body functions and for the health of muscles and bones.

A．incorporate
B．synthesize
C．integrate
D．assimilate
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单项选择题
In conclusion, walking is a cheap, safe, enjoyable and ______ available form of exercise.
A．recklessly
B．readily
C．potentially
D．amenably
单项选择题
She ______ maintained that her grandsons were innocent, and nothing could dissuade her from that belief.
A．skeptically
B．correspondently
C．hesitantly
D．steadfastly
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