1) 1 Recycling is part of the two / three 'Rs. a) two b) there  2) 2 We usually use plastic bags once / twice before we throw them away. a) once b) twice 3) 3 Each year 100,000 / 1 million marine animals die because of plastic bags. a) 100,000 b) 1 million  4) 4 Most plastic bags are biodegradable/ non-biodegradable. a) biodegradable b) non-biodegradable 5) 5 It can take up to 1,000 / 100 years for a plastic bag to decompose.​ a) 100 b) 1,000

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