The word  "many"  in "many worry"  (lines 31) refers to:

Questões de assuntos semelhantes

• Choose the correct option.
• Choose the alternative in which the determiner 'neither' is used with the same meaning as the one in italics in the text.
• The sentence in bold type in the text refers to
• Read the paragraph below and answer question 33. In 1829, a poor tailor in Paris, Barthelémy Thimonnier, invented the first sewing machine in the...
• The scarcity of food may lead to long term effects such as