If you want to see a doctor, fix the date with him ahead of time. This is a commo_______ ithe USA. ( )
·habit
·law
·rule
·custom
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