He must have had an accident, or he __ then.
A would have been here B had to be here C should be here D would be here
出自:统招专升本-----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