giúp em vs ạ em cảm ơn mn trước ----- Nội dung dịch tự động từ ảnh ----- 13. David left the party before we arrived there. When 14. I have only recently started wearing glasses. I didnt 15. We haven't gone to a concert for ages. It's 16. Sarah hasn't seen her friends since she left for the United States. Sarah last 17.1 have never stayed in such an expensive hotel before. This is