Adult educatiohas become popular _______. ( )
·because many old people are changing their professions
·because some people are looking for better jobs
·because they have high costs for repairs and advanced technology
·all of the above
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