III. Course Design（共20分） 1. English teachers frequently take advantage of a wide variety of teaching aids to help them with their teaching, among which are TV/radio/online commercials. Please (1) briefly describe a TV/radio/online commercial of your choice in no more than 100 words (8分) and, based on the TV/radio/online commercial, (2) elaborate on the activities that you design to help high school students enhance their four basic skills and the teaching objective behind each activity(12分).