Nam asked his teacher, “Is Neptune the eighth planet in the Solar System?”
⇒ Nam asked his teacher if Neptune was the eighth planet in the Solar System.
Nam asked his teacher, “Is Neptune the eighth planet in the Solar System?”
⇒ Nam asked his teacher if Neptune was the eighth planet in the Solar System.
Dịch: Nam hỏi giáo viên liệu sao Hải Vương có phải là hành tinh thứ tám trong Hệ Mặt Trời không.