◎ 题干
The manager ________ the workers how to improve the program since 9 am.
[     ]
A. has told  
B. is telling
C. has been telling  
D. will have told
◎ 答案
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◎ 解析
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◎ 知识点
    根据魔方格专家分析,试题“The manager ________ the workers how to improve the program since 9 am.[ ]A. has toldB. is tellingC. has been tellingD. will have told…”主要考查了你对  【现在完成进行时】  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。