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

完成拼图验证

按住下方滑块,将拼图拖到缺口处后松开。

拼图背景,将小拼图拖到缺口处
向右拖动滑块