visible in the distance.
Fifty years ago London suffered from smoke and fob
Londoners called it pea-soup fob
because it looked so thick.
Today the smogis gone.
and the air remains clear
and fish has returned to the Thames
thanks to the Clean Air Act and other measures.
17. What river is London sitting on?
18. Which of the following is not mentioned in the passage?
19. According to the passage, which of the following is not true?
20. What legislation helps clean the air?
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