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In the past twenty years，there has been an increasing tendency for workers to move from one country to another.While some countries have restricted most__1__to local people，others have attracted and welcomed migrant workers.This is particularly the case in the Middle East，__2__increased oil incomes have enabled many countries to call in outsiders to improve local facilities.Thus the Middle East has attracted oil.workers __3__the U.S.A.and Europe.It has brought in workers from many countries, __4__ South Korea and Japan. Sometimes a disadvantage has a compensatingadvantage.For example，the __8__ living conditions often lead to increased friendship when workers have to __9__ on each other for safety and comfort.In a similar way, many migrant workers Can save large sums of money partly because of the__10__of entertainment facilities. The work is often complex and full of problems but this merely __11__ greater challenge to engineers who prefer to find solutions to problems rather than do routine work in their home country. 1 A cases B jobs C activities D uses 3 A from B with C in D of 5 A parts B conditions C methods D clothes 7 A role B difficulty C event D attraction 9 A depend B look C base D go 11 A presents B accepts C takes D meets 13 A investment B strike C contract D duty | 
