单项选择题

A．It is cheaper.
B．It is dearer.
C．It is more flexible.
D．It is simpler.
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单项选择题
A．The situation.B．The solution.C．The recommendation.D．The office building.
A．The situation.
B．The solution.
C．The recommendation.
D．The office building.
单项选择题
A．The disadvantages of working in an office.B．The waste produced in an office.C．To save resources when working in an office.D．How to save water in a restroom.
A．The disadvantages of working in an office.
B．The waste produced in an office.
C．To save resources when working in an office.
D．How to save water in a restroom.
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