单项选择题

Is there any possible ______ explanation for his bad health since he seems to have no obvious disease

A．psychiatric
B．psychological
C．surgical
D．physical
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单项选择题
She refused to ______ the door key to the landlady until she got back her deposit.
A．hand in
B．hand out
C．hand down
D．hand over
单项选择题
No longer are contributions to computer technology confined to any one country; ______ is this more true than in Europe.
A．hardly
B．little
C．seldom
D．nowhere
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