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
He has an______ understanding of what needs to be done.
A．infectious
B．incredible
C．incompatible
D．inaccessible
单项选择题
Employers who establish retirement plans must be______ about engaging in transactions with their plans.
A．indecisive
B．cautious
C．implicit
D．conscious
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