The girl is talking to a man with a ponytail. She is my friend3/30The girl is talking to a man with a ponytail. She is my friend.The girl who is talking to a man with a ponytail is my friend.The girl, whom a man with a ponytail is talking to, is my friend.My friend is the girl, who is talking to a man with a ponytail.The girl, who is talking to a man with a ponytail, is my friend.Giải thíchChọn đáp án A Mệnh đề quan hệ "who" thay thế cho chủ ngữ là người trong câu