单项选择题

The ______ of rain forests may hamper a developing country in its fight against poverty.

A．reservation
B．preservation
C．conservation
D．compensation
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单项选择题
The publishing company offers their staff opportunities for ______ in decision-making.
A．apprehension
B．appreciation
C．presentation
D．participation
单项选择题
Ignorant people were ______ of Columbus's theory that the earth was round.
A．mysterious
B．cynical
C．skeptical
D．tolerant
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