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This city has one of the most _______ underground rail networks in the world.

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Factories and companies should be constructed in ________ places only.

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When my children _____, I will teach them how to study English.

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She lives in one of the most ______ parts of the city. There are lots of luxury shops there.

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Hue becomes one of the most ________ destinations for travelers to Viet Nam with the number of three million tourists a year.

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They make sure that the rooms in that resort in Phu Quoc Island are _______even the big ones.

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In my opinion, Hanoi with a history of over one thousand years is more _______ than any other city in Vietnam.

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Singapore is a ______ country. It includes Malay, Chinese, Indians, European and Vietnamese.