No one can recall any detail about the accident. It is at least twenty years since it __________.(2分)
Ahad taken place
Bwas taken place
Ctook place
Dwas taking place
出自:长安大学大学英语3

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