Great changes ______ in Shanghai since the beginning of the reform and opening-up policy.
A. took place
B. has taken place
C. has been taken place
D. have taken place
出自:中北大学-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