Read the following passage and mark the letter A, B, C, or D on your answer sheet to indicate the correct word or phrase that best fits each of the numbered blanks from 19 to 24.

Traditionally, rural villages in Vietnam ___(1)___ handicrafts when they were not busy ___(2)___ planting or harvesting crops. Over time, ___(3)___ villages developed the expertise to make specialized products and so particular villages became famous for such things as weaving, woodwork, lacquer work and metal products. With industrialization, many villagers moved to the cities but maintained their craft skills and networks to produce products for the city market, ___(4)___, craft villages make furniture, grow flowers or make utensils for the urban population. Other villages changed from ___(5)___ traditional crafts to producing different products desired by an industrialized ___(6)___.