摘要： Stop! You can never touch this machine when it , it is very dangerous. A. has been operated B. will be operated C. is operated D. is being operated
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Stop! You can never touch this machine when it ________, it is very dangerous.
A. has been operated B. will be operated C. is operated D. is being operated
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Stop! You can never touch this machine when it ________, it is very dangerous.
- A.has been operated
- B.will be operated
- C.is operated
- D.is being operated
Stop! You can never touch this machine when it ________, it is very dangerous.
| A．has been operated | B．will be operated | C．is operated | D．is being operated |