1) We ........... protect the ................... to ............... global warming. a) must / greenhouse / help b) must/ environment/prevent c) should/environment/ grow d) shouldn't/greenhouse/help 2) To prevent extincion of ....................... we ................... hunt. a) deforestation/shouldn't b) deforestation/should c) endangered animals/ mustn't d) endangered animals/ must 3) We .............. / ........................... to stop air pollution. a) shouldn't / recycle b) mustn't / take action c) should/ eco-friendly d) must/take action 4) People ................. use less water and electricity to stop ................ a) mustn't/ pollution b) must/pollution c) should/ recycling d) shouldn't/ recycling 5) We.................. keep the tap running while washing our faces. a) must b) mustn't 6) Everybody ................ use ....................... products to protect the planet. a) shouldn't/eco-friendly b) must/greenhouse c) mustn't/greenhouse d) should/eco-friendly 7) Public transportations................ be more common to decrease ...................... emission. a) mustn't /exhaust gase b) must/greenhouse c) should/exhaust gase d) shouldn't /exhaust gase 8) people .............. use social media carefually to ................ / ...................... a) should/reuse/negative impact b) shouldn't /reuse/negative impact c) must/decrease/negative impact d) mustn't / negative impact 9) People ................./ ........................ to prevent getting any ................... a) must/take precaution /pesticides b) should/take precaution/ diseases c) mustn't /take precaution/ diseases d) shouldn't / take precaution /pesticides 10) We ................ / ................... the lights to save energy. a) should/switch off b) shouldn't/switch off c) mustn't/switch off d) must/switch on 11) People .................... cause environmental ............. a) must / waste b) shouldn't / waste c) should/ waste 12) We .................. use poisonous chemicals. a) must b) mustn't c) should 13) Governments ............... use ............................ a) should/fossil fuels b) must/ renewable energy c) shouldn't/ renewable energy d) mustn't/renewable energy 14) Animals ................ live in their natural habitats. a) must b) mustn't 15) Everyone ........... plant a tree to ................ decrease deforestation. a) shouldn't  b) should

Unit 9

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