classes:  lecturer. should answer the questions of students as quickly as possible, should not confuse or ignore the questions of students.  curriculum. should answer the questions of students as quickly as possible, should not confuse or ignore the questions of students.  facility. should answer the questions of students as quickly as possible, should not confuse or ignore the questions of students.  general. should answer the questions of students as quickly as possible, should not confuse or ignore the questions of students.