The official said rescuers were workingto find the missing miners in the coal mine blast.A

问题补充：

The official said rescuers were workingto 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

答案：

(答案→)A. round the clock

B. in the clock

C. around the time

D. in the meantime

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