A(n) ________is the total amount of greenhouse gases that are generated by our actions., carbon footprint, carbon dioxide, global warming, ecosystem, One _______ of an open-air market is that it is different from place to place., attract, attraction, attractive, attractively, She picked up some real bargains _______., for sale, on sale, in sale, on a sale or return, Survivors of the flood were ________ by helicopter., collapsed, buried, shaken, rescued, Don’t use too much water _______ you are having a shower, as soon as, while, after, until, At 10 o’clock tomorrow, the new bookshop in the corner _______. Let’s go and visit it, opens, opened, is open, has opened, At this time yesterday, people __________ for eco-friendly products in the supermarket, were shopping, shopped, are shopping, shop, Con Dao National Park provides a rich _______ for marine life., ecosystem, carbon dioxide, habitat, pollution, It’s hard to believe that we cannot _______ when earthquakes will happen, predictive, prediction, predict, predictor, We can find many products _______ lower prices in a discount shop., at, by, with, on, How can we know when an active volcano will ________ again?, erupt, destroy, damage, affect, _______ I get to school, I will show you my writing about the habitat of polar bear, As soon as, While, Until, Till, The shuttle bus _______ every 15 minutes to take customers to the parking lot, leaves, don’t leave, left, are leaving, We __________ about saving energy when the teacher __________ the classroom., talked / entered, were talking / entered, talked / was entering, were talking / was entering

Multiple choice 3

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