连词成句。
1．park; the; is; air; the; in; fresh (.)
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2．mountains; are; many; countryside; there; in; the (.)
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3．keeps; high; it; them; sky; in; the (.)
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4．need; to; air; alive; we; keep; us (.)
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5．has; colour; it; no; shape; or (.)
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