题文
During the period of recent terrorist activities,people___not to touch any unattended bag
| A．has always been warned |
| B．were always being warned |
| C．are always warning |
| D．always warned |
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During the period of recent terrorist activities,people___not to touch any unattended bag
| A．has always been warned |
| B．were always being warned |
| C．are always warning |
| D．always warned |
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