If you burn fossil fuels, carbon dioxide ______., produce, will produce, is produced, will be produced, If the people from UNICEF call, ______ them I ______ them back later., tell, will call, will tell, will call, tell, would call, will tell, would call, If we ______ to pollute our planet, future generations ______., continue, will suffer, continued, would suffer, had continued, would have suffered, continue, are going to suffer, If you ______ to see someone drop litter in the street, what ______?, happen, will you do, happened, will you do, happen, would you do, happened, would you do, What ______ the local government do if there ______ an earthquake in the area?, will, had been, would, were, would have, were, might have, had been, A lot more people ______ by the flood if there ______ a warning., will be trapped, is, would be trapped, weren't, might have been trapped, wasn't, would have been trapped, hadn't been, ______ the drought continue, many people ______ to leave their hometown., Should, will be forced, Should, would be forced, In case, will be forced, In case, would have been forced, ______ using fossil fuels in the couple of years, it ______ decades for the planet to recover., If we stops, would still take, Should we stop, might still have taken, Were we to stop, would still take, Had we stopped, might still have taken, ______ the Galapagos Islands, he ______ his theory of evolution., If Chales Darwin did not visit, would not develop, Were Chales Darwin not to visit, might never have developed, If Chales Darwin had not visited, might not have been developed, Had Chales Darwin not visited, might never have developed, We'll go up to the mountains this weekend ______ the weather's okay., as long as, in case, otherwise, provided, You can have a pet ______ you promise to look after it properly., but for, otherwise, provided, supposing, ______ the price of oil tripled tomorrow. What do you think ______?, As long as, In case, On condition that, Suppose, Applications for membership are accepted ______ applicants are over 18., in case, on condition that, providing, supposing, You should have your air conditioner serviced, ______ you'll waste a lot of energy., as long as, in case, otherwise, provided that, The new agreement provides increased protection ______ sickness or unemployment., as, on condition that, in case of, provided, Take an umbrella with you ______ the weather gets worse., as long as, in case, providing, suppose, ______ governments act now, the environment is really going to suffer., As, On condition that, Otherwise, Unless, I'm quite happy to lend you money, ______ you make sure I get it back., as long as, in case, otherwise, suppose, The school fair should be a great success, ______ we don't have the same problems with the weather as last year., in case, otherwise, provided, suppose, It'd be great to see you on Friday evening, ______ you've already got other plans., as long as, in case, suppose, unless, Your idea sounds fine in theory, but just ______ something goes wrong. What then?, otherwise, provided, suppose, unless, Write your name at the top of your essay, ______ I won't know which one's yours., in case, otherwise, providing, supposing, The judge allowed the accused to stay at home ______ she reported to the police every morning., otherwise, on condition that, provided that, unless, Could you go to the shop for me? I have to stay in ______ the courier comes., as long as, in case, providing, supposing, Make sure you mix the ingredients well, ______ you might get lumps in your cake., otherwise, providing, supposing, unless

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