If I ______ an astronaut, I would travel to Mars., am, was, were, had been, would, would have, If humans had wings, they ______ across the sky., could fly, fly, could have flown, will fly, flew, If I ______ a spaceship, I would explore the universe., have, had, had had, would have, What ______ you do if you saw an alien?, do, will, would, did, If birds ______ able to talk, what would they say?, are, were, had been, would be, If an astronaut ______ lost in space, the rescue team would look for them immediately., gets, got, had got, would get, If I ______ on the Moon, I would take thousands of photos., live, lived, had lived, would live, If penguins could fly, they ______ probably travel long distances through the air., will, would, have, had, If we ______ a rocket, we would visit another planet., own, owned, had owned, would own, If you ______ to space, what would you take with you?, go, went, had gone, would go, If a bird ______ as big as an airplane, it would be difficult to control., is, was, were, had been, If astronauts ______ without a spacesuit, they wouldn't survive for long., travel, travelled, had travelled, would travel, If the astronaut ______ more carefully, she would have avoided the problem., worked, had worked, would work, has worked, If we ______ the weather forecast, we wouldn't have flown into the storm., checked, had checked, would check, have checked, The bird would have escaped if it ______ the danger earlier., saw, had seen, would see, has seen, If the pilot had reacted faster, the plane ______ the mountain., wouldn't hit, wouldn't have hit, hadn't hit, wouldn't have been hit, If I ______ harder at school, I would have become an astronaut., studied, had studied, would study, have studied, The rocket would have reached the Moon if everything ______ according to plan., went, had gone, would go, has gone, If the scientists ______ the problem earlier, they could have fixed it., discovered, had discovered, would discover, have discovered, If the eagle ______ higher, it would have avoided the drone., flew, had flown, would fly, has flown, What would you have done if you ______ an alien spaceship yesterday?, saw, had seen, would see, have seen, If the astronaut hadn't forgotten the tool, the repair ______ easier., would be, would have been, will be, had been, The mission would have failed if the engineers ______ the mistake., didn't notice, hadn't noticed, wouldn't notice, haven't noticed, If the bird had stayed in its nest, it ______ injured., wouldn't get, wouldn't have got, hadn't got, doesn't get, If the pilot ______ the instructions, the plane would have landed safely., followed, had followed, would follow, has followed, Eagles fly ______ than many other birds., fast, faster, fastest, more fast, Astronauts must explore ______ than tourists during a space mission., carefully, more carefully, most carefully, as carefully, A rocket travels ______ than a commercial airplane., quickly, more quickly, most quickly, as quickly, Pilots need to react ______ than passengers in an emergency., quickly, more quickly, most quickly, as quickly, Bats can fly ______ than some large birds., quietly, more quietly, most quietly, as quietly, An experienced astronaut can solve problems ______ than a beginner., efficiently, more efficiently, most efficiently, as efficiently, Some birds migrate ______ than others., far, farther, farthest, farer, Modern rockets can carry satellites ______ than older rockets., easily, more easily, most easily, as easily, If the crew communicated ______, they would make fewer mistakes., clearly, more clearly, most clearly, as clearly, Of all the astronauts, Maya completed the experiment ______., carefully, more carefully, the most carefully, as carefully, Which animal can move ______ through the air?, gracefully, more gracefully, the most gracefully, as gracefully, If you practised flying in a simulator every day, you ______ an experienced pilot., become as skilled as, would become as skilled as, would have become as skilled as, had become as skilled as, This pilot doesn't fly ______ the previous one., as carefully as, as careful than, more carefully as, carefully than, A beginner cannot solve the problem ______ an experienced astronaut., as efficiently as, efficiently than, more efficiently as, as efficient than, A hummingbird can move its wings ______ many other birds., as quickly as, as quick as, quicker as, the quickest as, quicker, quickest, Which animal can hover?, Which picture represents "The Milky Way"?, Which image represents a rocket?, Which picture shows a valley?, Which picture represents a planet?

Review Unit 6

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