摘要： Scientific experiments by students without the teachers’ instructions can be dangerous. A. carry out B. carrying out C. carried out D. carrying
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Scientific experiments __________ by students without the teachers’ instructions can be dangerous.
A. carry out B. carrying out C. carried out D. carrying
查看习题详情和答案>>Scientific experiments __________ by students without the teachers’ instructions can be dangerous.
A. carry out B. carrying out C. carried out D. carrying
Scientific experiments __________ by students without the teachers’ instructions can be dangerous.
A. carry out B. carrying out C. carried out D. carrying
查看习题详情和答案>>Scientific experiments __________ by students without the teachers’ instructions can be dangerous.
|
A．carry out |
B．carrying out |
C．carried out |
D．carrying |
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