单项选择题

Biologists have ascertained that specialized cells convert chemical energy into mechanical energy.

A．determined
B．argued
C．pretended
D．hypothesized
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单项选择题
Regional planning deals with proposals concerning outlying communities and highways as well as with urban affairs.
A．outlandish
B．exclusive
C．exempted
D．remote
单项选择题
In various parts of the world, the devout participate enthusiastically in public procession during the major events of the liturgical year.
A．pious
B．serious
C．diseased
D．misled
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