People/know/Ha Long Bay/recognise/UNESCO

People/know/Ha Long Bay/recognise/UNESCO.
 
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2. Temple of Literature/be/first/destination/schedule.
 
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3. They/think/visit/Mai Chau/this/time/year/be/best.
 
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4. People/believe/visit/Huong Pagoda/bring/luck.
 
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5. People/believe/Phong Nha/be/biggest/cave/Viet Nam.
 
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Choose the best option