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Some people fear that ______ air pollution may bring about changes in ______ weather around the world.
| A．/, the | B．the, / | C．an, the | D．the, a |
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Some people fear that ______ air pollution may bring about changes in ______ weather around the world.
| A．/, the | B．the, / | C．an, the | D．the, a |
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