单项选择题

They worked ______ the cost of the holiday and decided if they could afford it.

A．at
B．out
C．off
D．for
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单项选择题
An author must not be too ______ to criticism.
A．sensible
B．sensitive
C．senseless
D．insensible
单项选择题
Instead of going into details about his project, he spoke ______.
A．in short
B．in general
C．in particular
D．in common
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