【单选题】

Don't forget ______when you are finished with the electric iron.
A．to turn it off

B．turning it off
C．to have turned it off
D．having turned it off

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根据网考网移动考试中心的统计，该试题：

57%的考友选择了A选项

39%的考友选择了B选项

3%的考友选择了C选项

1%的考友选择了D选项

Don't forget ______when you are finished with the electric iron.A．to turn it off