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________ many countries in Latin America have been trying to reduce gaps in income, America has allowed inequality to grow.
A．WhileB．SinceC．IfD．Where
A
考查連詞。A. 雖然；然而B.自從 C. 如果 D. 在哪里。句意：雖然許多拉丁美洲國家在努力縮小收入差距，美國已經(jīng)允許不平等增長。故選A。
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