We were all overjoyed at the news _ the experiment turned out to be a success. B. that
A. which C. if
D.what
出自:西安交通大学-土木工程-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