He didn.t pass the final examination. He ______ it.
(A)must have prepared for
(B)ought to prepare for
(C)ought to have prepared for
(D)ought to prepare for
出自:郑州工程技术学院-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