连词成句。
1. as, U. S., same, the, the, it, flag, is, colour (.)
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2. is, this, London, in, Buckingham, Palace (.)
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3. what, know, this, country, you, do, is (?)
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4. China, U. K., is, west, of, the (?)
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5. know, the, of, U. K., I, capital, the, city (.)
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