1.---In recent years, _____ problem of global warming has been very serious.
---That's right. People are facing ____ number of natural disasters now.
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A. the; a
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B. a; the
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C. a; a
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D. the; the
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2. Recently our class held a fierce ________ as to whether to raise the price of school meals or not.
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A. bargain
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B. debate
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C. quarrel
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D. contest
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