3.Bill put his hands behind his back,______nobody could see his hands.
A. so
B. and
C. or
D. but
出自: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