单项选择题

They are put lo work when young, and they stay ______.

A．to
B．down
C．up
D．put
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单项选择题
Though having been living in Shanghai for 20 years, he still has a ______ northern accent.
A．distinctive
B．distinct
C．distinguished
D．distinguishing
单项选择题
＄500 ______ far from enough for the girl to complete even one semester at college.
A．are
B．has
C．have
D．is
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