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听力原文：M: How are you doing with your plan？W: No one knows how to do the work correctly,
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Compared to alternative energy, one of the disadvantages of fossil fuels is ______.A．Minin
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As is known to all, there are many forms of energy, ______is solar energy.A．one of thatB．o
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We know the fact______the energy makes the cells able to do their work.A．thatB．whichC．what
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One of the things that make Fiji a tourist attraction is A. its comfortable hotels B.
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One can change his energy cycle once he make up h
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There are many problems in our modern world. One very serious problem is energy. We get a
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