单项选择题

These birds are __________ because they are the only ones in this region with this type of coloring.

A．special
B．extraordinary
C．especial
D．unique
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单项选择题
Although architecture has artistic qualities, it must also satisfy a number of important practical
A．regulations
B．obligations
C．considerations
D．observations
单项选择题
We are going to __________ our home by building another room onto it.
A．spread
B．enlarge
C．stretch
D．develop
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