1. One of the great technological innovations in the last two hundred years was the process of refining oil into gasoline????., the internal combustion engine would not have been practical and cars might not have been developed.1) Without this
2) As a result
3) Because of this
4) For example
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2. ???., people today are living much longer than their ancestors.1) Despite modern medical science and technology
2) Having benefited from medical and nutritional advances
3) By living in a world full of industrial pollution
4) Because of working hard and having stressful lives
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3. ?????most people like to sleep approximately eight hours a day, researchers believe we can survive comfortably on half that much.1) As we know that
2) In spite of the fact that
3) Whenever it looks like
4) Even so it seems to be
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4. The world relies heavily on fossil fuels, yet other excellent sources of energy???? Hydroelectricity, for example, is a very attractive from of energy.1) offer a lot of disadvantages
2) cannot be replaced
3) have already been developed
4) are much less efficient
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5. He is happy to welcome you into his home, ????.1) a small apartment on sukhumvit road
2) his father came from china
3) that is, his bedroom is being repainted
4) he is a part-time teacher
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