单项选择题

A．Change the wall’’s color.
B．Rearrange the furniture.
C．Buy some fine furniture.
D．Hang some pictures.
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单项选择题
The least serious damage caused by acid rain is _________.
A．poisoning of plant roots
B．leaching of heavy metals
C．changing the blood chemistry in
D．corrosion of metal structures
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psychologist
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