单项选择题
The drinking water is
contaminated
with impurities.
A. blackened
B. polluted
C. darkened
D. mixed
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单项选择题
She is very conscientious about her work.
A. worried
B. careful
C. anxious
D. nervous
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单项选择题
She has consolidated her power.
A. strengthened
B. won
C. hardened
D. united
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