He acted as if he
everything in the world.
A. knew
B.knows
C.had known
D.won.t know
出自: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