“Knowing English” must mean knowing how to（）in English.
在分度圆上相邻两齿的同侧齿廓间的弧长，称为（）。 ["齿距","大径","周节","分度圆"]
论述杜威的实用主义的教育思想。
进入压力容器内检验用照明用电不超过（） ["12V","24V","36V","220V"]
一般来说，尖形结构往往是（） ["分权较多","控制较弱","层次少，幅度大上","层次多，幅度小"]
The three main things that a learner has to acquire when learning a new structure are the form, meaning and（）of the structure.
