Ho Chi Minh City, that used to be called Sai Gon, is the biggest city in southern Viet Nam. A. that B. to be C. the biggest D. southernĐoạn văn32/40Ho Chi Minh City, that used to be called Sai Gon, is the biggest city in southern Viet Nam. thatto be the biggest southernGiải thíchChọn đáp án A