单项选择题

The water at the bathing beach became()by refuse from the factory.

A. pollute
B. polluted
C. polluting
D. being polluted

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Thousands of animal lives would be () daily if we just eat vegetables.

A. spared
B. freed
C. escaped
D. released
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The clothes a person wears may express his () or social position.

A. curiosity     
B. status    
C. determination
D. significance
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