Câu 3: Fill in each blank in the sentences with the correct word from the box. 6.  Hoi An used to be one of the _______________  ports of Southeast Asia, which were used by the Japanese, Portuguese, Dutch, French and Chinese merchants.  7.  Nha Trang, a _______________ coastal city in Central Viet Nam, is generally recognized as Viet Nam's main beach destination.  8.  Formerly known as Saigon, Ho Chi Minh City is a metropolis which is still young but very ________ 9. The Mekong Delta is well-known for its _______________ waterways with many rivers. canals and streams flowing through the region.  10. Phu Quoc Island is the ____________ place for riding, snorkeling, scuba diving, and relaxing.