People warned us not to go out alone.19/20People warned us not to go out alone.We were warned not going out aloneWe were warned not to go out alone by people.We weren't warned to go out alone.We were warned not to go out alone.Giải thíchHướng dẫn dịch Đáp án đúng là: D Dịch: Chúng tôi được khuyến cáo không ra ngoài một mình.