—It seems that you know Dr. John very well.
—Of course, we ________ together for five years in the 1990s.
A.have worked | B.had worked |
C.are working | D.worked |
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—It seems that you know Dr. John very well.
—Of course, we ________ together for five years in the 1990s.
A.have worked | B.had worked |
C.are working | D.worked |