I didn.t know what to do but theaidea suddenly _____ me.
·happened to
·happened upon
·occurred to
·occurred upon
出自:运营管理

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