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题目内容
（佳木斯大学语言治疗学）
One piece of work of _____ United Nations is to help _____ poor i _____ developing countries.( )
· /; the; /
· /; the; a
· the; the; the
· the; /; the
· /; the; /
· /; the; a
· the; the; the
· the; /; the
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