1 那个老师正在给学生上数学课That teacher is having a maths class with the students2 我们正在上物理课I am taking a biology class.3 你几点下课 / 几点放学 ？When is the class over?school over?4 再上两节物理课，我们就该放学了。School will be over after another two physics classes5 那个男人，每隔一周就会到这个图书馆That man comes to this libary every other week....
