单项选择题

To test his theory, the chemist______an experiment.

A．set up
B．set out
C．set forth
D．set in
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单项选择题
It is very plain that such a life as this is far more______to health than that of the man who can afford little leisure for necessary rest in the course of the day.
A．conductive
B．constructive
C．conciliate
D．conducive
单项选择题
Most insulation devices of this kind,______manufactured for such purposes, are extremely expensive to install.
A．that are
B．which is
C．those are
D．as are
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