You may either choose to ask your SA for pre-class tasks of the WLS course you are about to attend, or go the bill board where you can read the specific tasks of each course.是什么意思_You may either choose to ask your SA for pre-class tasks of the WLS course you are about to attend, or go the bill board where you can read the specific tasks of each course.在线翻译_英语_读音_用法_例句