(1) 선생님이 언제 우리들에게 중국어를 가르치셨지?
이문장을 작문할때when did a teacher teach chinese to us?
when did the teacher teach chinese to us?그리고
(2) 왜 교실의 문이 열려있었지?
why was the door of a classroom open?
why was the door of the classroom open?각각 어떤게 맞는건가요?
저는 a하고 the가 많이 어렵네요 ㅠㅠ