连词成句。
1. U. S., city, here, of, the, is, capital, the (.)
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2. China, of, the, west, is, U. S. (.)
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3. U. S., Canada, north, the, is, of (?)
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4. is, this, not, the, White House (.)
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1. Here's the capital city of the U. S.
2. China is west of the U. S.
3. Is Canada north of the U. S.?
4. This isn't the White House.