单项选择题

______ is medical technology that allows the prolongation of life artificially while the world is already over-populated

A．Of what use
B．What use
C．Of which use
D．Which use
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单项选择题
She ______ her vacation so much that she didn't want it to end.
A．missed
B．budgeted
C．loathed
D．relished
单项选择题
I would like to say that a theory is essentially an abstract, symbolic representation of reality.
A．what it is conceived
B．that is conceived
C．that is being conceived of
D．what is conceived of
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