The official said rescuers were working_____to find the missing miners in the coal mine blast.
| A．round the clock | B．in the clock | C．around the time | D．in the meantime |
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The official said rescuers were working_____to find the missing miners in the coal mine blast.
| A．round the clock | B．in the clock | C．around the time | D．in the meantime |
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