多项选择题班集体的特征有( )。
多项选择题新型的师生关系要求( )。
多项选择题根据使用的主要教学方法,课的类型分为( )。
单项选择题It was believed that things would get worse, but ()it is they are getting better.
A. before B. after C. because D. as
单项选择题The president stood by a window inside the room,(), looking over the square.
A. where I entered B. into which I entered C. which I entered D. that I entered