私醫聯招 英文歷屆試題｜第 477 題

Human migration is the permanent change of  (26)  by an individual or group; it excludes movements such as nomadism, migrant labor, commuting, and tourism, all of which are transitory in nature. Migrations fall into several broad  (27) . First, internal and international migrations may be distinguishable. Within any country there are movements of individuals and families from one area to another (for example, from rural areas to the cities), and this is  (28)  movements from one country to another. Migrating to a new country is more complicated. Second, migration may be voluntary or forced. Most voluntary migration, internal or external, is undertaken  (29)  better economic opportunities or housing. Forced migrations usually involve people who  (30)  by governments during war or other political upheavals or who have been forcibly transported as slaves or prisoners. Intermediate between these two types of migrations are the voluntary migrations of refugees fleeing from war, famine, or natural disasters.