单项选择题

John Smith, being a diligent student, never refuses to______ more responsibilities that are assigned to him.

A．take up
B．take in
C．take off
D．take on
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单项选择题
The bird flew upward and dropped the shellfish onto the rock to ______it open.
A．cut
B．press
C．break
D．shake
单项选择题
The Chinese community there, consisting of 67,000______, is the largest concentration of Chinese outside Asia.
A．visitors
B．workers
C．adults
D．inhabitants
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