问题
选择题
—You seem familiar with Mr. John?
—Of course, we________ together for three years in the 1990s.
have worked B. had worked C. are working D. worked
答案
答案：D
考查时态。根据句意“在二十世纪九十年代，我们一起工作过三年”，是过去发生的事情，用一般过去时。故选D。