单项选择题

However, at times this balance in nature is （）, resulting in a number of possibly unforeseen effects.

A. troubled
B. disturbed
C. confused
D. puzzled

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He wrote an article criticizing the Greek poet and won（）and a scholarship.

A. faith
B. status
C. fame
D. courage
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Each person’s genetic code is unique except （）identical twins.

A. in case of
B. in the case of
C. the point in case
D. a case of
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