单项选择题

His continual severe financial problems kept his mother in a ______ state ofanxiety.

A．perpetual
B．eternal
C．everlasting
D．usual
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单项选择题
The crystals ______ in water to create a purple liquid.
A．dispose
B．discharge
C．dispatch
D．dissolve
单项选择题
One question has particularly ______ those specialists on this study.
A．intrigued
B．invaded
C．intervened
D．inverted
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