单项选择题

They took ______ measures to prevent poisonous gases from escaping.

A．effective
B．beneficial
C．valid
D．fruitful
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单项选择题
Every man in this country has the right to live where he wants to ______ the color of his skin.
A．with the exception of
B．in the light of
C．by virtue of
D．regardless of
单项选择题
In general, the amount that a student spends for housing should be held to one-fifth the total ______ for living expenses.
A．acceptable
B．available
C．advisable
D．applicable
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