Last term，our school offered optional courses for the students in Senior 2．At the beginning of the term，our teacher introduced several courses to us，including Music Appreciation，Advanced Math，Western Art，and etc．We selected the courses started．We went into different classrooms to begin our study．During the lessons，some of us enjoyed beautiful music，while others learned amazing knowledge in math．（介绍课堂）Everyone gained what they couldn't get in the regular lessons．（高分句型一）Thanks to the optional courses，we had the opportunities to learn what we were really interested in．（高分句型二）（课程作用） Last term，our school offered optional courses for the students in Senior 2．At the beginning of the term，our teacher introduced several courses to us，including Music Appreciation，Advanced Math，Western Art，and etc．We selected the courses started．We went into different classrooms to begin our study．During the lessons，some of us enjoyed beautiful music，while others learned amazing knowledge in math．（介绍课堂）Everyone gained what they couldn't get in the regular lessons．（高分句型一）Thanks to the optional courses，we had the opportunities to learn what we were really interested in．（高分句型二）（课程作用）