---HaveyouknownDr.Jacksonforalongtime?       ---Yes,sin...

問題詳情：

---Have you known Dr. Jackson for a long time?

        ---Yes, since she              the Chinese Society.

      A. has joined            B. joins             C. had joined               D. joined

【回答】

D

知識點：動詞時態

題型：選擇題