Check the fire escape in advance and make sure that you can find ______ in the dark when lights have failed.
出自:三门峡职业技术学院英语听说

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