Attention，please！All the mobile phones must________before the meeting starts．
| A．turn off |
| B．be turned off |
| C．be turning off |
| D．turned off |
Attention，please！All the mobile phones must________before the meeting starts．
| A．turn off |
| B．be turned off |
| C．be turning off |
| D．turned off |
试题篮
()
粤公网安备 44130202000953号
