This kind of smiling exchange represented the most __ part of my jogging experience ithe States. ( )
· enjoyable
· painful
· honest
· angry
出自:华北水利水电大学英语

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