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

練習題2.9W

問題詳情:

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

---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

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