单项选择题

The once separate issue of environment and development are now ______ linked.

A．intangible
B．indispensable
C．inextricably
D．incredibly
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单项选择题
Huntington and many of its competitors are working to make remedial instruction a commodity as ______ and accessible as frozen yogurt.
A．ubiquitous
B．rational
C．necessary
D．credible
单项选择题
It is a myth that the law permits the Food and Drug Administration to ignore requirements for ______ drugs while brand-name drugs still must meet these rigid tests.
A．specific
B．generic
C．intricate
D．acrid
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