单项选择题

Hydrogeology is the study of water and its properties, including its ______ and movement in and through land areas.

A. flow
B. absorption
C. distribution
D. evaporation
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单项选择题
A loan refers to anything given on condition of its return or repayment of its ______.
A. excess
B. debt
C. currency
D. equivalent
单项选择题
Scientists generally hold that language has been so long in use that the length of time writing is known to cover is （） in comparison.

A. overwhelming
B. uninspiring
C. astounding
D. trifling
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