单项选择题

He ______ to your home, for he doesn't know your address.

A．can't have been
B．mustn't have been
C．shouldn't have been
D．needn't have been
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An author must not be too ______ to criticism.
A．sensible
B．sensitive
C．senseless
D．insensible
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You have to take the ______ examination before an interview can be considered.
A．precious
B．preliminary
C．prior
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