Choose the best answer to complete the sentencesIII. Choose the best answer to complete the sentences. 1. America says it ____________ until other countries ____________ more action. A. won’t act - took B. won’t act – take C. doesn’t act - will take D. acts - don’t take 2. ____________ you buy and use a plastic bag, ask yourself if you really need it. A. Before B. When C. While D. After 3. ____________ the arrival of humans on Earth, species became extinct naturally. A. Before B. Since C. After D. As soon as 4. ____________ my little cousin saw the tiger in the cage, he cried out. A. Before B. Since C. When D. Until 5. As soon as we ____________ risks of climate change, we all ____________ together to fight against them. A. realize - worked B. realized - worked C. realized - work D. will realize – work 6. ____________ I get to school, I will show you my writing about the habitat of polar bear. A. As soon as B. While C. Until D. Till 7. __________ fossil fuels are burnt, they release large amounts of carbon dioxide into the air. A. Till B. Until C. Before D. When 8. Most species don’t receive protection ____________ their populations reduce to nearly zero. A. as B. when C. before D. until |