A lot of great changes have been made __________ the factory since the last time the manager came to inspect it. (A) with (B) to (C) of (D) as 여기서 왜 to 가 들어가나요? 무슨 숙어 인가요? Unless hourly quotas have been met, at no time __________ the production hour swill a worker leave machinery unattended or take standard breaks. (A) for (B) along (C) inside (D) during 문장 해석이 잘 안되네요..답이 d인데 그럼 during이하 문장에선 동사가 없는건가요?