Everyday Life
Q1
Many public pools use chlorine and other ..... in order to keep the pools clean and safe. These cleaning agents kill disease-causing organisms.
(*) decks
(*) blocks
(*) strips
(*) disinfectants
Many public pools use chlorine and other ..... in order to keep the pools clean and safe. These cleaning agents kill disease-causing organisms.
(*) decks
(*) blocks
(*) strips
(*) disinfectants
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