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2.at,left,turn,traffic,the,lights
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3. is,Where,post,the,office
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4. is,big,a,city,Beijing
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5.an,is,envelope,What
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1.Thisisabeautifulenvelope.
2. Turnleftatthetrafficlights.
3.Whereisthepostoffice?
4. Beijingisabigcity.
5. Whatisanenvelope?