Some words have little meaning of their own. Their meaning can be inferred from certaincontext. Such words are usually not accented even though they are the last contentwords 0
出自:伊犁师范-英语语音

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