When will the railway in our city in the length of about 208 kilometers be in service?

When will the railway in our city in the length of about 208 kilometers be in service?___________2024. Two fifths ______been completely smoothly so far.A. Until; has B. Until; have C. Not until; has D. Not until; have这个be in service，不应该是表状态，表延续性吗？应该和until连用啊，为什么答案是和Not until连用？