问题
选择题
_________ many countries in Latin America have been trying to reduce gaps in income, America has allowed inequality to grow.
A．While
B．Since
C．If
D．Where
答案
答案：A
这题考查连词的用法：while这里是“虽然”，表示转折，句意是：虽然拉丁美洲的很多国家一直在减少收入差别，美国允许这种不平等的增长。选A。