Below is a summary of some of the main points of the passage. Read the summary and then select the best word or phrase from the box below, according to the passage. You should decide on the best choice and mark the corresponding letter on the Answer Sheet with a single line through the center. Increasing numbers of people have migrated from the countryside and moved into towns and cites over【17】. Most are in the Third World, where they are【18】accommodate because facilities are at their most inadequate and meager resources are most stretched. In spite of【19】living conditions, the vast numbers of people moving into cities constitute the biggest【20】ever. While governments can take action to improve the conditions of squatters, the real solution is to【21】the process of urbanization. But to do this governments need to change the ways in which they【22】their development funds on the urban areas. If their priorities【23】rural productivity could be increased and this would help develop the national economy. In the end, however, the rural population also lacks the【24】that their urban countrymen can exert on governments. (17)