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Stop! You can never touch this machine when it , it is very dangerous. A．has bee

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Stop! You can never touch this machine when it , it is very dangerous. A．has bee

Stop! You can never touch this machine when it ________, it is very dangerous.

A．has been operatedB．will be operated C．is operated D．is being operated

试题答案

D

解析

标签：machinethisitwhentouch

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