You must have waited here for a long time ,___________you?
The plane takes off at 6:00 p.m. So I have to arrive at the airport ________ 5:30 p.m. at the latest. A after B. since C. until D. by
--How long ________ as an assistant here? -- Ever since I finished middle school.
--Forgive me for hurting you by saying so. --________
They had ________ in keeping in touch with each other that they decided to move to the same city.
--Is this the office ________ your parents are working now? --No. They are working in the next one.