Comprehension Passage
Direction: Fill in the blanks with appropriate words by choosing the suitable set of answers from the options given below the paragraph.
Water treatment is ______ (1) ______ in order to improve water quality. The processes ______ (2) ______ for water treatment depend on the quality of the water supply. In all cases, water has to be disinfected in order to ______ (3) ______ any existing microorganisms present in water.
Select the most appropriate word from the options against ____ 1 ____.
1
annulled
2
sustained
3
performed
4
realized