填空题 Listen to the statement and complete the statements below. Use up to three words. University courses include a lot of 1 1 and they are falling into 2 2 , restricted optional course and general optional course. The first kind of courses is 3 3 and regular. University itself always provides students with the opportunities to choose restricted optional courses on condition that the 4 4 is met The last kind of courses by all the students freely.