[9급 국가직 영어 2007년 11번]

밑줄 친 부분 중 어법상 옳지 않은 것은?
In Rome, Italy, a store burglary suspect, when ① caught in a store after closing hours, ② explained the police that he suffered from a desire to sleep constantly and had fallen asleep inside the store. ③ To prove his point, he ④ kept falling asleep during police questioning.
영어
정답 ②

출처: 인사혁신처 공개 기출(공공데이터포털, 이용허락 제한 없음)