Nghe theo đường link và trả lời câu hỏi: What types of goods did people buy and sell on the Silk Road? Make a list

câu hỏi What types of goods did people buy and sell on the Silk Road. Make a list.
link nghe: https://elt.oup.com/student/everybodyup/level05/videos/videos-01?cc=vn&selLanguage=en