单项选择题

A．Twenty minutes.
B．Twenty-five minutes.
C．Fifty minutes.
D．Fifty-five minutes.
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单项选择题
A．Congratulations! You’ve been promoted.B．All right.C．No problem.D．Don; t mention it.
A．Congratulations! You’ve been promoted.
B．All right.
C．No problem.
D．Don; t mention it.
单项选择题
If you have any trouble, you can turn ______ him for help.
A．for
B．at
C．to
D．in
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