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
单项选择题
A．They brought in bald eagles from Canada.B．They explored new ways to hatch baby bald eagles.C．They developed new types of feed for baby bald eagles.D．They found ways to speed up the reproduction of bald eagles.
A．They brought in bald eagles from Canada.
B．They explored new ways to hatch baby bald eagles.
C．They developed new types of feed for baby bald eagles.
D．They found ways to speed up the reproduction of bald eagles.
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