单项选择题

A system of strict discipline has a ______ effect on conduct.

A．automatic
B．deliberate
C．beneficial
D．customary
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单项选择题
The students showed ______ when solving the difficult maths problems.
A．validity
B．purity
C．ingenuity
D．reliability
单项选择题
For a little while the girl ______ for her dead cat, but she got over it after a few days.
A．ached
B．depressed
C．grieved
D．upset
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