◎ 题干

They ______ on the program for almost one week before I joined them, but still no good results _______ so far.
A.had worked ; come outB.have worked ; came out
C.had been working ; have come outD.have been working ; have come out
◎ 答案
查看答案
◎ 解析
查看解析
◎ 知识点
    根据n多题专家分析,试题“They ______ on the program for almost one week before I joined them, but still no good results _______ so far.A.had worked ; come outB.have worked ; came outC…”主要考查了你对  【一般现在时】【将来进行时】【过去完成进行时】【过去将来时的被动语态】  等知识点的理解和应用能力。关于这些知识点的“档案”,你可以点击相应的链接进行查看和学习。