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单项选择题

Try ______ the green button to see if the machine will start.

A．press
B．to press
C．pressing
D．to have pressed
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Facial tattooing is a standard ______ among certain peoples.
A．custom
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C．practice
D．tradition
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The shower ______ over, we went on with our journey.
A．was
B．being
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It's no good ______ him. He is always indifferent towards other's matters.
A．to turn to
B．turning to
C．turn to
D．turned to
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