Peter: "What will you do at Ha Long Bay, Mary?" Mary: "I don't know ______ A. I often go hiking there B. I am going to the cinema C. I maĐoạn văn22/40Peter: "What will you do at Ha Long Bay, Mary?" Mary: "I don't know ______ I often go hiking there I am going to the cinemaI may explore some caves I went mountain climbingGiải thíchChọn C