单项选择题

She ______ high levels of lead in her drinking water.

A．perceived
B．spotted
C．detected
D．discerned
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单项选择题
Sometimes children have trouble ______fact from fiction and may believe that such things actually exist.
A．to separate
B．separating
C．for separating
D．of separating
单项选择题
The president explained that the purpose of taxation was to_______government spending.
A．finance
B．expand
C．enlarge
D．budget
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