1. 다음 글의 밑줄 친 부분 중, 어법상 틀린 것은?
after moving to a new city, i ①joined the company baseball team. being the oldest player, i had to play the outfield. during one game, i made a ②few mistakes. then i kept ③hearing someone shouting, “way to go, mr. green” and “you can do it, mr. green.” i was amazed someone would know my name in this strange city. after the game, i met my wife and son and asked ④that they knew who was shouting encouragement in the stand. my son spoke up and said, “dad, it was me.” i asked why he was calling me mr. green and he replied, “i didn’t want anyone ⑤to know that i’m your son.” 모의고사에 나오는 건데요4번이 정답이라는데 왜 4번이 틀린건지 모르겠네요목적절을 이끄는 접속사 that 으로 쓰인것 아닌가요??설명 부탁드립니다. ^^