| Circle
the correct word to correct the sentence
1.
Water in rivers or lakes may look _______________ when it is not.
clean
| muddy | dirty
2.
People work all day and night in the ________________ .
treatment
plant | school | river
3.
Germs can make us very ______________ .
healthy
| sick | wacky
4.
Water treatment plants clean our __________ in a special way.
electricity
| water | petrol
|