单项选择题
Which president advocated the lifting of the ban on women teachers（）
A．Xu Yangqiu. B．Wu Yifang. C．Tao Xingzhi. D．Chen Heqin.
单项选择题 What is the following passage mainly concerned with（）
单项选择题 The three approaches mentioned in the passage aim at（）
单项选择题 What is the main topic of the following passage（）
