They're trying very hard to finish in time and they're working ..... the clock.

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This is a companion discussion topic for the original entry at https://english.best/questions/preview/4834-they-re-trying-very-hard-to-finish-in-time-and-they-re-working-the-clock?fbclid=IwAR3WthvM6UvbtfhwatIpMzmTLpKvpm-3hnSCBbsyHatB_HKS5jfncGBR-KY
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