单项选择题

A computer ______ think for itself. It must be told what to do.

A．can't
B．couldn't
C．may not
D．might not
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单项选择题
The doctor insisted that he ______ seriously ill and that he ______ operated on immediately.
A．be; should be
B．was; be
C．was; must be
D．should be; should be
单项选择题
Tom, more than anyone else, ______ anxious to go to China again.
A．is
B．are
C．has
D．have
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