Something must ------to stop the factory from pouring waster water into the river.A be done B do C doing Dhave done

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Something must ------to stop the factory from pouring waster water into the river.A be done B do C doing Dhave done
Something must ------to stop the factory from pouring waster water into the river.
A be done B do C doing Dhave done

Something must ------to stop the factory from pouring waster water into the river.A be done B do C doing Dhave done
Something must be done to stop the factory from pouring waster water into the river.

a