4. A: Do you know where he went for his vacation?
B: No, .
A: Do you know where he went for his vacation?
B: No, I don't know where he went for his vacation.
A: ±×°¡ ÈÞ°¡¸¦ ¾îµð·Î °¬´ÂÁö¸¦ ¾Æ¼¼¿ä?
B: ¾Æ´Ï¿À, ³­ ±×°¡ ÈÞ°¡¸¦ ¾îµð·Î °¬´ÂÁö ¸ô¶ó¿ä.