单项选择题

Excuse me. May I have a piece of ______.

A．water
B．knife
C．paper
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单项选择题
It's time to play games, ______ your sports shoes, please.
A．Put away
B．Put on
C．Put up
单项选择题
What ______ to Tom yesterday
A．happened
B．has happened
C．was happened
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