问题描述：
--Did you meet the professor at the airport?--No,he _____ by the time I _____ there.
A.had left;got B.has left ;reached C.was leaving ;got D.left ;had got
A.had left;got B.has left ;reached C.was leaving ;got D.left ;had got
问题解答：
我来补答展开全文阅读