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