Hoi An Ancient Town was recognized as a ______________ by UNESCO IN 1999.Đoạn văn18/55Mark the letter A, B, C or D on your answer sheet to indicate the correct answer to each of the following questions. Hoi An Ancient Town was recognized as a ______________ by UNESCO IN 1999. World Heritage SiteWorld National SiteWorld Culture SiteWorld Nature SiteGiải thíchChọn A