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The Arctic, which is abundant in oil, _____ second only to the Middle East, is ______ home to seals.
| A．the; a | B．/; the | C．the; a | D．/; / |
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The Arctic, which is abundant in oil, _____ second only to the Middle East, is ______ home to seals.
| A．the; a | B．/; the | C．the; a | D．/; / |
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