Because he doesn’t leave immediately, I call a policeman. 19/21Because he doesn’t leave immediately, I call a policeman. If he left immediately, I wouldn’t call a policeman. If he leaves immediately, I won’t call a policeman. Unless he leaves immediately, I will call a policeman. Unless he leaves immediately, I won’t call a policeman. Giải thíchĐáp án đúng: A Dịch: Nếu anh ấy rời đi ngay lập tức, tớ sẽ không gọi cảnh sát.