The flight was supposed to take off at ten o’clock, but ________ we had to wait until eleven o’clock.


A、 in vain


B、 in advance


C、 in case


D、 in effect
出自:石家庄铁道大学大学英语1

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