单项选择题

Women workers wear hats ______ their hair gets caught in the machine.

A．if
B．in case
C．unless
D．because
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单项选择题
You can borrow some money from him this time but don't make a ______ of it.
A．custom
B．customs
C．habit
D．tradition
单项选择题
Building the new house ______ the family as many as twenty thousand dollars.
A．takes
B．spends
C．pays
D．costs
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