Water is first ______ into the barrel., pouring, pours, poured, It then flows ______ through three layers., downwards, upward, straight, The water is ______ by sand, charcoal and gravel., filtering, filtered, filters, Clean water is ______ into a storage drum., transferred, transferring, transfers, Finally, it is ______ from a tap., collection, collecting, collected

Gap Fill (Process Language)

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